Second Sister (2025) Movie Script
(Adapted "Second Sister"
by Chan Ho-kei)
(Agreed by
Crown Culture Corporation)
(Second Sister)
(Shocking news!
Jieun jumped from her balcony!)
(She killed herself!)
("A high school girl jumped...
Police are investigating")
(What do we do?)
(Answer quickly.)
(Don't worry.
It's not our fault.)
(But she jumped because of us.)
(We essentially killed her!)
(We did not kill anyone.)
(We just told the truth as it is.)
(Get it out of your head.)
(Are you there?)
(Hold on. I'm coming over.)
Stop!
Hello, I'm...
What do you want?
PI Jung told me about you.
So early in the morning.
Totally ruined my sleep.
Sir, are you Seol Jungyeong?
I'm not your sir.
Call me PI Seol. Sit.
Explain in five minutes.
- What?
- Miss.
I need a rundown before I accept.
Right, sure.
Four months ago,
my sister was groped in a bus.
The groper was Shin Jeongman.
(Man in His 40s
Jailed for Molestation)
After he was sentenced
six months in prison,
I thought it was done and dusted.
But then...
Shin's niece claimed his innocence
by posting a long statement
on an online forum.
It said Shin simply lectured
my sister for smoking
near a bus stop.
It also said out of spite,
my sister wrongly accused the man.
It even stated
a vile rumor at my sister's school
about my sister being an orphan
who hangs with delinquents
and that she's a sugar baby
who does drugs.
(Views)
The statement got
reposted everywhere,
exposing my sister's school
and her photos.
People only listened to the niece.
They bashed my sister
in all kinds of ways
with vicious, uncalled-for words.
Then, I realized.
Anyone can easily be
a demon online.
(High Schooler Commits Suicide
from 12th Floor)
Because of the anonymous post,
my sister was torn to pieces.
Because of the niece's post,
my sister eventually
killed herself.
After her suicide,
I hired a PI to find the niece
who posted.
Shin Jeongman has no sibling.
He's an only son.
I found out
Shin can't have a niece.
Then, the PI said this case needs
an ingenious hacker as a PI.
He recommended you.
Sir...
PI Seol.
I have to find the poster.
I have to know why she posted
and had to force my sister to die.
I must ask.
I'm going to decline.
- Why?
- It's too easy.
Too easy?
A few clicks
on the keyboards will do.
I won't waste my precious time
on a dull case like this.
A dull case?
Yes, dull.
That's below the belt.
Time's up now.
Can you leave?
I have to have breakfast.
Aren't you leaving?
Starting up as a small software
company in Silicon Valley,
SIQ is a global
IT venture company today.
It has intrigued many people.
First, SIQ was
founded by three people
including you, Steven.
Two other founders are
publicly representing the company,
but you work
mostly in the shadows.
Is there a special reason?
Excuse me, PI Seol!
Hello.
If you can pay 20 grand,
I'll do it.
- Where did you find my number?
- Can you pay?
I'll pay.
But you must
find her in one week.
Okay, I'm in.
We're on the same boat.
I'm going to talk real with you.
By the way, why did you
suddenly change your mind?
This case seems
more interesting than I thought.
It's the log-in record
of the online forum.
Give me some room!
Look at this.
It shows the same screen.
This is the log-in location.
This is ID kidkit727's IP address.
I tried to track the IP...
Do you know what IP is?
I'm not a dummy.
I guess.
I tracked the IP address.
It's in Luxembourg.
It can't be tracked.
Then, we can't find her
with the IP address.
I could try with her email, but...
She signed up
with an untraceable account.
I don't know what she's hiding,
but she's a pro.
Then, how do we find her?
We'll have to dig into Shin
to see how connected they are.
(Am I... a murderer?)
(Am I a murderer?)
(You're doing it again.
Stop this self-sabotage.)
(It was her choice
to kill herself.)
(It has nothing to do with you.)
(I ain't sorry for someone
who throws people under the bus.)
(What if the police find us?)
(I swear the police
can't find us.)
(They have no evidence.
How can they find us?)
(You know how good I am.
Don't worry a thing.)
(I won't.)
Shin and kidkit727
have no connection.
How can that be?
I checked
Shin's cell and computer usage.
He wasn't tech-savvy.
He would be online
to play a game of Go.
His wife, too.
They're not hacker materials.
From the way
kidkit727 wrote the post,
did you not notice
anything peculiar?
"Peculiar?"
It read like a defense
written for the defendant.
The legal representatives for Shin
and kidkit727
might be connected.
I'll dig deeper into this.
But I have a more promising lead.
Yun Jieun, your sister.
I want to check
your sister's cell.
(Student Card Yun Jieun)
(Yun Jieun, I know you well.
I've been watching you.)
(You just wait.
I'll yank your mask off.)
(I'll show the world
what a vile wench you are.)
(So don't even think about
(making excuses
for your sorry ass.)
(Girls like you only learn
the hard way.)
(Scared? You should be.)
(Because I'm about to
spread this photo around.)
(You'll be the trash in no time.)
(People who know you
will find out I posted the truth.
(Bullcrap.
Jieun, I'm proud of what I did.)
(You lied to frame a person.
I'd die than be shameless.)
(Sender Jieun:
Do you want me to kill myself?)
What are you doing here?
Things are looking up.
- I got another IP address.
- From where?
Korea.
Then you can get
the exact location.
She slipped this time.
But she isn't dumb enough
to show herself.
We have the IP address.
Why can't we get her location?
She sent four emails
and gave away three IP addresses.
The first two have
the same address.
The last two don't.
Different Wi-Fi was used
to access internet.
She kept changing locations
to send the emails.
Can we narrow it down to an area?
The first two were
sent in Hanam-dong.
The third one, in Oksu-dong.
The fourth in Seongsu-dong.
But the Wi-Fi was logged in
by a prepaid cell.
We can't track it down.
- Then...
- But...
One of them can be found easily.
"One of them"?
Two people are behind kidkit727.
How do you know that?
Well, let's call one, "Seven".
Based on the ID, kidkit727.
I'll call the other one, "Rat".
Based on the email,
"rat10934@yandex.com."
Seven is probably the mastermind
who wrote the post and emails.
Rat probably provided
technical support,
but you might ask,
"On what grounds?"
The posting
and emailing
were executed so differently.
One falls short a lot.
Then what do you mean
we can find them easily?
We find Galaxy users
from Jieun's school.
Seven is one of them.
But wait.
Are you saying one of
Jieun's classmates did this?
The answer is in Seven's email.
Think about it.
Why do you think Seven rashly
blackmailed Jieun?
She could've waited for Rat
to send it more stealthily.
It's simple. Seven was impulsive.
Seven couldn't hold it in.
What is the last sentence
of the first email?
"You'll never smile again
after this."
People give away information
when they talk or write.
Like a habit they don't notice.
Seven clearly loathes your sister.
Whether it's for Shin's case
or personal reasons.
Your sister was deflated, right?
She was.
She didn't seem fine
after our mother died last year.
Seven must have secretly liked it
when Jieun felt
miserable and broken.
But that wasn't enough.
Look at the email.
"Girls like you learn
the hard way."
"You'll never smile again
after this. Wench!"
Seeing "again" being emphasized,
Seven must have seen Jieun
smiling
or feeling at ease.
Seven couldn't take it
and sent the email.
To agonize your sister.
That's
all it took?
The worse the malice,
the pettier the trigger.
Considering it was
to bully your sister,
the email is a lot less polished
and more reckless
compared to the post.
You can tell
by the attached photo.
They're just being teens.
Being teens?
The photo was
a blackmail to Jieun.
To me, she's just
cozying up with the redhead.
Don't you think?
If Seven was to
socially kill Jieun,
a more suggestive photo
would be here.
Let's summarize.
Seven could've
checked in on Jieun daily.
Seven rashly blackmailed Jieun
with a half-ass photo.
Considering that,
Seven is your sister's age.
If Seven was
to check in on Jieun daily,
Seven very likely
goes to the same school.
Then how do we know
it's a Galaxy user?
Do I have to explain every detail?
Do you see "Galaxy mail" here?
That says it's a Galaxy user.
If we narrow the students
down to Galaxy users
we get our suspect.
But so many students
use Galaxy phones.
Legwork is the only way.
(I actually didn't
tell you something.)
(I sent an email to Jieun before.
Will this be a problem?)
(Did you send it
like I told you to?)
(So that it can't be
traced back to you.)
(I did.)
(Then don't worry about it.)
(I gave you
a prepaid Wi-Fi password)
(that's untraceable.)
(Okay.)
Seven is one of them.
How did you narrow it down?
I checked every log-in
in the school intranet.
Do you remember any of the names?
(Na Jihwan Park Junghwan
Min Juno...)
Any nicknames?
I don't recall.
Weren't you close to your sister?
How could you
not know her friends?
Do you have any photos?
I might not know their names,
but I know the faces.
I prepared them
because I knew you'd say that.
I worked all night
to hack their phones one by one.
I'll flip through.
Wait.
I remember her.
So she came to the funeral?
I think she came alone
around 8 p.m.
A friend who came to the funeral
couldn't be the culprit, right?
It could be the opposite.
This is the last one.
Her name is Lee Sumin.
The one you remembered is
Kim Hayeon.
They've been in Jieun's class
for three years.
So definitely...
They both...
They both came to the funeral.
Both of them? The boy, too?
His name is Ku Eunho.
It was his first time
being in Jieun's class.
I think he's dating Sumin
who is beside him.
But he uses an iPhone
instead of Galaxy.
They visited my home.
It was Christmas Eve
two years ago.
They brought her home
since Jieun got sick
at their party.
Mom had to look after
Jieun all night.
It's worth looking
into this girl, Sumin.
Whether she's the sender or not,
she can tell us
about Jieun's school life.
Hey, you scared me.
("We won't forget you")
Has the school investigated
the forum post about Jieun?
I wonder if any students
were involved.
We didn't do any investigation.
Parents resisted.
It was also a sensitive matter
for the school.
I see.
Almost forgot...
you teach Korean, right?
- I do.
- I'd like to see Jieun's essays.
I want to know
if Jieun hadn't shared
any thoughts before leaving us.
I didn't notice anything special.
Give me a few minutes.
I'll grab her essays.
It's her essay collection
for this year.
It's five notebooks.
Thank you.
Would it be okay
for us to take them?
Of course, you can.
Also, would it be okay
to say hello to Jieun's friends?
To thank them
for coming to the funeral.
Were you close to Jieun?
You could say so.
You brought Jieun home
when she got sick.
Remember?
Has anyone hated Jieun,
or could have spread
malicious rumor about her?
Princess.
It has to be Princess.
"Princess?"
A rich girl called
Jo Minji in my class.
We call her Princess
because she's
surrounded by servants.
Her clique controls
the classroom vibe.
You lose all your friends
the moment they isolate you.
Instead of being targeted next,
we say nothing.
Was Jieun ever targeted?
She was never targeted.
But the last time we voted
for a field trip location,
Princess nominated a theme park
but Jieun voted against it.
So going to a palace
won by one vote.
I'm sure Princess was ticked off.
She talked bad about Jieun
to students in other class.
She's such a spiteful, mean girl.
But no evidence says she did it.
They had a fallout,
but Princess never bullied Jieun.
Princess also
went to Jieun's funeral.
She came to the funeral?
- Princess did?
- Did you not know?
I saw her standing alone
at the door on the day.
Did you say hi?
No, we're not close.
Also, Sumin doesn't like her.
They treat each other
like strangers.
You two and Hayeon were
the only students at the funeral.
Hayeon? Kim Hayeon?
Not Princess?
Yes, her hair is about this long.
Her glasses have a red frame.
That sounds like Hayeon.
- What's wrong?
- No, nothing.
It's just... I didn't know
Hayeon and Jieun were that close.
I'm sure Jieun was grateful
to see anyone of you.
I'll give you my number.
Tell me if anything comes up.
Sure.
Thanks.
I said, I'll lead.
If you jump in again,
I'm off this case, got it?
What did I do wrong?
I just remembered
they brought Jieun home.
I was softening up...
Because of you,
I missed the key question.
What was the question?
You want to get to
the bottom of that.
Look at the date on the photo.
"2021, December 24th."
Was this photo
was taken on the day.
Sumin brought Jieun home?
Kids would've talked about it
if you hadn't jumped in.
Are you still proud?
How was I supposed to know?
You could've let me know.
Don't just blame me for it!
They might read our intention.
Can you be warm and fuzzy
if you had known it?
Sorry.
We're Jieun's family.
Are you Jo Minji
in 12th grade, Class 1?
I am... Why?
Jieun borrowed $100, right?
It was in her diary.
Sorry for the delay.
What?
I never lent her money.
Aren't you Jo Minji?
I am, but I never lent her money.
Right...
Is there another Jo Minji
at school?
Yes, one more in Class Four.
I must have been confused. Sorry.
Jieun talked a lot about you.
She talked...
A lot about me?
She wanted to
apologize for something.
She even asked how she could.
Apologize to me?
I guess Jieun never told you.
Last year, everyone wanted
to go to the theme park.
But Jieun voted against it.
Jieun also wanted to go,
but she didn't have
enough allowance.
I mean
if she didn't have money,
I could've lent her some.
She was hesitant because
she'd borrowed from others.
And since Jieun
never spoke to you,
I'll apologize for her.
No, you don't have to.
We thought Jieun was bullied
by someone who held grudge.
Since you were in her class
would anyone do such thing?
About Jieun...
My teacher told us to say nothing.
So I have no idea
what the reporters
or others heard.
Are you Hayeon?
I'm Jieun's cousin.
This is Jieun's sister.
Hello.
We came to pick up her stuff
and decided to thank her friends
for coming to the funeral.
I see.
Were you two close?
She never talked at home.
We weren't close.
She always did homework there.
We'd say hi to each other.
So I wanted to
say my last goodbye.
By any chance
did anyone hate Jieun?
Sorry, but I really
wasn't close to her.
Right, sorry for asking again.
I don't know exactly.
But from what I see,
Sumin and Jieun had a fall out.
They were so close
that they were inseparable.
But they didn't even
look at each other later on.
They avoided each other
on purpose.
They started doing that
all of a sudden.
Do you think Sumin spread
bad rumors about Jieun?
I don't know.
But... when friends fight,
they do terrible things.
And these days,
everyone knows
how to spread bad rumors online.
It's so easy to distort the truth
and attack someone.
Can I get my phone?
Nice service.
Did you check the student card?
Yes, to avoid mishandling
all the phones and tablets.
Right...
See you.
Actually, Jieun and I...
We used to go out.
Although it
only lasted two weeks...
Sumin must have made it
awkward to tell before.
I had a crush on Jieun
for a long time.
I finally plucked up the courage.
We started going out.
But not even a week later,
Jieun was cold to me.
To me and to Sumin, too.
Like they weren't friends anymore.
Then, she broke it off
after two weeks.
Sumin was really
nice to me back then.
Sumin and I have been friends
since kindergarten.
But it turned out
Sumin liked me all along.
As soon as Jieun told Sumin
about dating me,
Sumin wrote Jieun off.
Sumin was mad at Jieun
for stealing her crush.
Sumin was anguished.
After that...
They kept avoiding each other.
I drove wedge between them...
I couldn't help Jieun
when she needed help the most.
It's all my fault.
It's no one's fault.
Don't kick yourself.
You said you couldn't help her.
What happened at the karaoke
on the Christmas Eve?
How do you
know about that?
By accident
while organizing Jieun's stuff.
We don't know the details, though.
That night,
Sumin and I bumped into
an older friend from school.
The friend said Jieun was with.
Eunseong High boys
who are in a band.
They're not just a band.
They're infamous
for drugging girls
and pimping them out.
I got so worried
while having dinner with Sumin.
So I sneaked into a bathroom
to call Jieun.
Jieun's tongue was all loose.
She couldn't answer my questions.
Something bad was going to happen,
so I told Sumin everything...
I said Jieun was in danger.
What did Sumin say?
She kept ignoring me.
But I kept telling her.
So she suggested we go,
and we went out.
Did you find Jieun at the karaoke?
No, I saw some guys leading Jieun
towards a motel.
We jumped in and yelled,
"What do you think you're doing
to a high schooler?"
When people started looking,
they left Jieun and ran.
Imagine if you hadn't found Jieun.
It was way back, but thank you.
Don't mention it.
Only you and Sumin know
about what happened
that night, right?
But then...
- Damn, look at that picture.
- This guy, Choi Jaewon.
He's one of
the band member's brother.
I think he spread the rumor.
Which class is Jaewon in?
He doesn't go here now.
He was shipped off
for something else.
"Shipped off?"
It means forced transfer.
Right, forced transfer.
I almost forgot.
When you talked about Hayeon,
you seemed to have things to say.
Sumin pointed Princess,
but I say Hayeon's more likely.
Princess runs her mouth,
but she doesn't do that in hiding.
Hayeon's sneaky enough
to tattletale someone's dirt.
Did Jieun have a beef with Hayeon?
They didn't.
Hayeon did
the exact same thing before.
This girl, Yunju,
went to my school.
Hayeon told a teacher about Yunju
kissing an older student
on the rooftop.
Yunju and the student
got kicked out.
I mean...
they got kicked out for a kiss?
The older student was a girl, too.
Rules are strict
as with all Christian Schools.
Also, Hayeon's always like that.
She's always right.
She thinks she can do no wrong.
To her, it was sinful
for a girl to date another girl.
It goes the same with
Jieun's case.
When Hayeon knew.
Jieun was the girl
in the Christmas rumor,
Hayeon must have become biased.
Hayeon probably spread rumors
about Jieun
hanging out with the band boys.
That's only your assumption,
right?
That's true, but...
I suspect Sumin the most.
She has a motive.
She knows about the photo well.
What we need is physical evidence,
not a hunch.
Do you remember I told you
kidkit727 moved locations
to use Wi-Fi?
I didn't tell you something.
A reference number is recorded
by the provider
when Wi-Fi is used.
The MAC address,
short for medium access control.
So in a nutshell,
for 1,000 smartphones in Korea,
1,000 MAC addresses exist.
If we find a Galaxy phone
that has kidkit's MAC address,
we can find kid kit.
Let's go back now and check.
Listen until I finish.
I've already checked.
What?
I set this device
to check MAC addresses
whenever we came across a phone.
The culprit was with us
all afternoon.
Why didn't you tell me earlier?
I'm 99 percent sure
one of the students
we met is the culprit.
But wait until
I'm 100 percent sure
to see all my cards.
I'll make the culprit willingly
show up in front of you.
(I know you're busy.)
(But Jieun's sister
was at school.)
(She asked a lot of things
like she knew something.)
(Sorry I was in a meeting.)
(What did she ask?)
(How Jieun was at school
and with her friends.)
(Did she come because she knows
what we did?)
(I'm so worried.)
(Don't waste your time worrying.)
(No one can know what we did.)
(Okay.)
(Are you busy tonight?)
(I need to see you and talk.)
(I can't this week.
I'll text you later.)
I came for my ID.
- Here.
- Thank you.
Did you find the culprit?
No... Not yet.
What did the police say?
Even if they find the culprit,
they can't really punish her.
What kind of response is that?
So irresponsible.
I want to take the afternoon off.
Is that okay with you?
Why? Is something wrong?
No, I have to go somewhere.
Okay, sure.
Welcome.
- Two hot soups?
- No.
I came to eat alone.
Did you two fight?
PI Seol is as picky as anything.
It's not what you think.
I was talking about the case.
I assumed he declined your case.
Did he talk about my case?
Two types of people
come to PI Seol.
A client and a gangster.
So you knew.
- Welcome.
- Hi.
PI Jung.
Hey, Soeun.
What a nice surprise.
- Did you have work in the area?
- Yes.
I came for your case.
My case?
I came to talk to
PI Seol about things
he had asked me to investigate.
He's a jerk
for telling me to come
all the way here.
Saying sending files
online isn't safe.
What did you investigate?
The redhead.
The guy in your sister's photo.
I know you're inside!
You investigated the redhead.
What's the result?
I did, but I found nothing.
He's been in a juvie for a year
for theft and assault.
- And?
- And nothing!
And I'm not done yet.
I'll let you know, so just leave!
Liar.
PI Jung investigated "things."
If it was just about the redhead,
he would've said,
"a person" or "a thing."
PI Jung's choice of words
has nothing to do with me.
PI Jung also said,
you asked him to come here
since sending files
online is not safe.
If it was just about the redhead,
a phone call would've done it.
PI Jung came
to hand you a physical result.
Be honest.
What are you investigating?
And what is this file?
How did Kim Yeonwoo meet the girl?
My firm holds
a free legal workshop
for the local community.
People also seek legal advice
during the workshop,
and our apprentices or
paralegals jump in.
That's how Yeonwoo met the girl.
He wasn't much of a lady's man.
The young girl was nice to him.
He must have forgotten his duty
as a paralegal.
To think now,
she must have
approached him to get information.
What information did
Yeonwoo give up?
Public stuff.
Like Shin's testimony
at the hearing.
Anything private was
our strategy to defend Shin.
Like his relationship
with his wife.
Any assumptions favorable to Shin.
Also, the information didn't
invade anyone's privacy,
including Shin's.
You fired Yeonwoo for this.
Don't worry about
being liable in any way.
Good.
Did Yeonwoo ever
mention the girl's name?
I'm trying to remember...
Yes!
He said, "Lee Sumin."
Why didn't you tell me earlier?
Sumin is the culprit.
This isn't decisive evidence.
If this isn't decisive,
then what is?
I told you.
We need physical evidence,
not a hunch.
How do we know
"Lee Sumin" in the conversation is
the one we know
or someone disguising as her?
PI Seol.
Do you even want to
find the culprit?
This was with the books
the teacher handed to us.
The unreturned
first half of "Anna Karenina."
I'm returning this
to school tomorrow.
You're going back there?
Come to the school
by noon tomorrow.
I'll show you
who the real culprit is.
It's been ten years
since SIQ was founded.
How did it all start?
Bullcrap.
I never rented a book.
How can I owe late fee?
You printed documents.
You owe $12.
Pay before the break.
First 50 sheets are free.
You wrote the rule, remember?
Black and white only.
That's not fair!
Did I make the rule?
Teachers did.
What do you want from me?
Hey.
- Hi, Soeun.
- Hey!
- Hi, Eunho.
- Hey!
The school feels scattered today.
Something is wrong
with our network.
The provider
couldn't find out why.
The library computer
is getting errors.
Sumin was told to return a book
she didn't borrow,
so we came.
Hi.
Your teacher... Can you call her?
Quick!
What's going on?
I almost missed this.
This was inside this book
Jieun borrowed.
This is...
This is Jieun's handwriting.
Then...
Is this... Jieun's will?
She left a will after all.
We just missed it.
(By the time you read this,
I won't be here)
This is the first half.
The rest must be in the next book.
(Hello, stranger.)
(I won't be here.)
(I think of death...)
(pimped out...)
(doing drugs...)
"Did?"
Sentences don't add up.
The first one also ended awkwardly
after "doing drugs."
The middle piece must be missing.
Does "Anna Karenina"
have a middle part?
No, it only has two books.
Can you check Jieun's record?
Sure, one second.
(I want the world to know...)
(prove my innocence...)
I found Jieun's rental record.
But other than "Anna Karenina,"
she hasn't rented any books.
- None?
- Yes, none.
Two books were all she rented.
Maybe, she kept it
in another book.
Like a textbook.
Ma'am, we should go home.
Please take a closer look
at places like Jieun's locker.
Okay, I will.
Let's head to my office.
I have to show you something.
- PI Jung.
- Soeun.
- Nice to see you again.
- What are you doing here?
He's my temp.
He dragged me in.
He owes me until I'm done.
Says PI Seol.
- Did it record?
- Of course.
It's nice and crisp.
It's looking good.
Okay.
- That's...
- Eunseong High School.
It's time to reveal the culprit.
Someone will go to the shelves
and pick up
"Crime and Punishment."
She's
kidkit727 we've been looking for.
Is that...
Is that Jieun's will?
Hey, calm down.
It's fake.
"Fake?"
It was Jieun's handwriting.
Flawless, right? I copied her.
I had so many samples.
It only takes
a few days of practice.
To fool even her family.
You confirmed that it's hers.
The suspect would believe
her sister's words.
Why are you doing this?
Is this a game?
Are you having fun?
Because it's the only way.
Rat is a hacker
who left nothing online.
The rest was circumstantial.
How else do we catch the culprit?
Why did you collect evidence then?
We must narrow the suspects down
to set a trap.
Is it wise to dump a fishing rod
without knowing
if there's any fish?
Then why is Hayeon the culprit?
The truth is...
Jieun never rented
"Anna Karenina."
I tampered
with the rental records.
I also had stolen
the book secretly.
Why "Anna Karenina" in particular?
It looked unpopular to students.
It's thick.
If "Anna Karenina" was a bait,
"Crime and Punishment"
is the hook.
Then, the second
and third pieces...
You placed them
when you went to the shelves.
Bingo.
It's as good as a confession.
Can't you see?
I added both "Anna Karenina"
and "Crime and Punishment"
in the records.
But what did Hayeon say?
But other than "Anna Karenina,"
she hasn't rented any books.
Jieun hadn't rented books
other than "Anna Karenina."
That was a test
for all the suspects.
So you brought Princess and Sumin
with network error, too.
Bullcrap!
I never rented a book.
How can I owe late fee?
Sumin was told to return a book
she didn't borrow,
so we came.
A play needs its actors.
If Hayeon is kidkit727,
how did she get the photo?
I'm sure Hayeon doesn't know much
about the karaoke incident.
The forum post only said,
"She drinks with the band bums."
The email only had the photo
without details.
I can tell she wrote the post
based on the photo.
It wasn't important to her anyway.
Then, the photo...
The band member's brother,
Choi Jaehwan. I bet he leaked it.
Damn, look at this picture.
Think about it.
Hayeon can steal student data
anytime she wants to.
Charge this.
It's called juice jacking.
You steal data
while charging the phone.
How can a teenager know
how to do that?
Rat must have told her.
It's a hacker.
I don't know why.
But Hayeon has been collecting
student data all along.
Even if Jaehwan
did not go to the library,
he would have
showed it to his friends.
And the photo
would have been leaked
if any one of them
went to the library.
How long have you been
suspecting Hayeon?
You basically targeted Hayeon
with this set-up.
The fake rental record
and the network error...
Ever since
I met her at the library.
Do you remember
what I asked everyone?
Has anyone hated Jieun,
or could have spread
malicious rumor about her?
It has to be Princess.
Sumin mentioned Princess
when asked.
I have no idea.
Princess had no idea.
I say Hayeon's more likely.
Eunho suspected Hayeon,
but Hayeon said...
But... when friends fight,
scary things do happen.
A completely different take.
And these days, everyone knows...
How to spread bad rumor online.
What's your point?
I asked if anyone hated Jieun
not to find kidkit727,
but someone else.
Someone else?
A boyfriend stealer
who hangs with band bums.
The girl is also an orphan.
Who is this anonymous student
who told Shin about this?
But Shin's niece
doesn't even exist...
Hayeon's the only one
who knows he doesn't have a niece.
Congrats. You found kidkit727.
Is she burning that?
Hey.
What are you doing?
Hey...
What the hell?
She was laughing.
She was laughing!
After doing that monstrous thing.
She burned Jieun's will
without even opening it!
She doesn't have
an ounce of guilt.
- After making my sister die.
- Put down the knife.
I don't care
if you kill her or skin her alive.
Not with my knife.
Leave me out of it!
Wait.
Why?
Why are you stopping me?
Do you want revenge?
Yes.
I'll rip that murderer
into pieces.
Okay.
Then let's calm down and talk.
Talk? About what?
Call the cops?
If you talk about the law...
You know the law can't help.
Then do we let her be?
She killed my sister!
So take revenge.
But it'll be hard alone.
Think of this as a warranty.
It's not cheap.
But I guarantee you'll be happy.
A discounted price of 200K.
You've seen my bank account.
Is this on purpose?
Revenge is post-paid
unlike investigation.
I'll design a custom payment plan.
Don't worry a thing.
Why are you doing this?
I believe in tit for tat.
If you accept my offer...
I'll gladly be your knife.
Fine.
I'll take it.
But you have to kill them all.
Everyone who had
their hand in this death.
(Jieun's sister
came to school again.)
(She even found her will.
I freaked out.)
(Her will?)
(Yes, her will.)
(What did it say?)
(Who knows? I got rid of it.)
(Reading it would
complicate things. I burned it.)
(Good job.)
(Are you free tonight?)
(Dad is on a business trip
to the US.)
(He's away for ten days.
I understand if you're busy.)
(I'll see you tonight.)
Your stocks are worth
one million dollars.
How does it feel to be rich?
Is it the first day of your break?
Yes.
(The truth about
the girl's suicide.)
(You're all murderers.)
(You're all murderers.)
(Her death...)
(sexually harassed...)
(She was framed.)
(It's nothing to die for.)
(He had no siblings.)
(He was an only son.)
(Then some niece showed up.)
(Droned on and on.)
(kidkit7270)
(Go to the online forum now!)
(Someone posted about Jieun!)
(What do we do?)
(Don't worry. It's all nonsense.)
(They know Shin Jeongman
doesn't have a niece.)
(It's an idle
conspiracy theorist.)
(Read the replies.
No one will believe the jerk.)
(Can I see you tonight?)
(Sorry I have
too much work today.)
(I'm so busy
I clock in on weekends.)
(Hard disc files...
led to her suicide.)
(It's about someone's life.)
(The back file I got
is incomplete.)
(Don't bother
tracking my IP address.)
(The hard disc
must have dirty crap.)
(This is interesting!)
(Too bad for the dead girl.)
(I want the truth now and badly.)
(Should the police
investigate it again?)
(The fake niece instigated!)
(Hey!)
(The forum is blowing up!)
(Did you delete
the files I sent you?)
(If it gets leaked, we're over!)
(What files?)
(Stuff I hoarded at school.)
(The photos and videos
I stole from others' phone!)
(Some lunatic is babbling about
hacking your computer!)
(Do you believe that?)
(What if the lunatic exposes you?)
(Then it's over for us!)
(You and I become murderers!)
Hello.
(No Caller ID)
Hello?
Murderer.
(No Caller ID)
Who is this?
If you call again,
I'll call the cops.
Psycho.
(No Caller ID)
(Start calling!)
(Did you all call? It was a girl.)
(Is she the instigating
fake niece?)
(Whose badmouthing
led a girl to die?)
(We should do the same.)
(Death to death!)
(Get her accomplice, too!)
(Someone call the police.)
(Your account
must have been hacked!)
(I just saw it, too)
(I'll keep watching.
You don't have to worry)
(I'm so scared.
Can we talk on the phone?)
(Sorry. My boss is beside me.)
(I'll call you later.)
Murderer.
Murderer.
Murderer.
Murderer.
You want her to die
for what she did.
Of course, I don't kill.
I'm not a hit man after all.
But if she kills herself
it's most ideal, right?
Are you saying
you'll disguise
a murder as suicide?
No, more like
what your sister did.
I'll make Hayeon kill herself.
Not because of a threat,
but herself.
If you tackle one's weakness,
it's more than possible.
Weakness?
Hayeon lives with her stepdad.
Her mother remarried
when Hayeon was little.
She cheated and left home,
abandoning her young daughter.
Who is this boy?
Hayeon's brother, Kim Hajun.
He was sent to an orphanage alone
when his mother remarried.
That boy is Rat.
Her stepdad is her legal guardian,
but she was always
closer to her brother.
He was Hayeon's only blood.
I'm sure they connected
since their mom abandoned them.
Anyway, they met often
behind their step dad's back.
If we tackle Hayeon's brother
who is her only
reliable confidant...
Suicide?
It's more than possible.
Guaranteed 100 percent.
You look entertained and excited.
I told you it'd be interesting.
Wake up.
Wake up! It's time to work.
Hello?
We'd better not say
anything at first.
It's your turn.
Your voice will be modulated,
so don't worry.
What do I have to say?
Anything?
Except about Jieun.
Hello?
Murderer.
Nice job.
Let's go rough on her this time.
Who are you? If you call again,
I'll call the cops.
Psycho.
Normal people get annoyed
by a late night prank call.
But guilty ones get shaken even
by the sound of the front door.
Worrying about the online world
finding out what she
and her brother did,
Hayeon's a nervous wreck.
Are people
talking about it online?
(You're all murderers.)
Are you Super Conan, the poster?
Who is Zerocool?
I am them.
But I am not.
Then this website here...
It's a fake site I made.
I'm controlling
Hayeon's phone and laptop.
What if Hajun shows up,
thinking it's weird?
He's so busy at work.
I bet he has no time
for his sister.
At this rate...
Two days max.
It's time for our first bullet.
What? Are you shooting a gun?
Did you snooze
in literature class?
It's a metaphor.
I thought it might be real
because I can't tell
if you're a criminal or a PI.
I mean...
It's as effective as a gun.
Murderer.
I just heard...
Isn't it cool?
It's an induction speaker.
Ultrasound doesn't
spread in the air.
So this can shoot sound
to an exact point.
As if,
- Murderer.
- It's a voice in your head.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
(Hajun! I'm so anxious.
Text me!)
(Not read.)
(The truth
about the girl's suicide.)
(I'm using another account.
This will be my last post.)
(I unzipped the files)
(and found tons of call numbers
and call history.)
(Messages didn't
sound like students.)
(The police will
investigate it again.)
No...
I didn't do anything wrong.
(Is the police finally
joining the match?)
(Where's the police
when you need them?)
(A sexual and financial extortion
against a vulnerable minor.)
(You'll get caught.
God will strike you!)
(Get the truth
about her unfair passing.)
(I bet she had an accomplice.)
(Get the accomplice, too!)
(Someone call the cops now.)
(Rot in a clink, dirty whore!)
Time for the finishing blow.
(Police Reinvestigating
the Eunseong High Suicide Case)
(The victim was blackmailed
by a female suspect.)
(A strong public
push for the police.)
(Hajun! I'm so anxious.
Text me!)
(Hurry up!)
(This is bad!)
(Where are you?)
(The poster called the cops!)
(This is serious.)
(Take a look at the forum.)
(What are you doing?)
(I'm so scared.)
(Call me as soon as you see this.)
(Please.)
It's an article
about her brother's arrest.
(Man in 20s Arrested Over.
(High School Girl
Exploitation Videos)
(...arrested for illegally
hacking intimate photos...)
The news of the arrest will
be a festival
for the online spectators.
Hayeon will be extremely agonized.
Will her brother's arrest
be enough to kill herself?
Some suicides
are a result of reason.
She could try to achieve a goal
by sacrificing herself.
Let's say a fire broke out.
You're with your sister.
You only have one air tank.
Will you use it?
Will you let your sister use it?
I'll make Hayeon believe
she's a threat to her brother.
I'll leverage their codependency.
"If I don't get caught,"
"my brother can stay innocent."
I'll lead her
to the absurd conclusion.
It's ridiculous but
I'll make Hayeon believe it.
Then...
I'll make her read this.
(The arrested man...)
(He's my colleague.)
(He has a sister.)
(...has to do with the dead girl.)
Hayeon will think
she's a threat to her brother.
She'll be shaken as much as
she loves and
cares for her brother.
Has anyone seen them together?
- How did you know?
- I came up with it.
For Hayeon to believe.
Even if she thinks
she'll send her brother to jail,
collecting personal data is
only a minor crime.
It's not bad enough
to waste her life.
Media will be all over
if it's a criminal case.
Then, citizens will put him
on trial again.
What Hayeon worries is
her brother being hunted down
online like Jieun was.
Seeing her brother
bashed for no reason,
won't she think
she ruined his life?
After that thought,
she'll think
it's easy for the police
to find the truth
about Jieun's case.
Then, confession isn't a choice.
She's been pressured by us
for a few days.
She'll choose
the fastest and easiest way,
her own death.
Watch Hayeon's last moment.
It's time to wrap up.
What?
I set up an induction speaker
at her home.
You'll hallucinate her again.
Pushing her to sacrifice for
her brother will easily end this.
Hey.
Get it done if you're serious.
I have a lot to do.
For true revenge for yourself.
"True revenge?"
Why do think
I'm dealing with Hayeon like this?
If she kills herself this way,
she won't leave a will.
I can wipe out the records
and reset her phone.
Her brother won't know
why his sister died
when she was fine a few days ago.
Won't he kick himself forever
for neglecting his sister
for work?
But no matter how agonized,
his sister won't come back.
Isn't this true revenge?
What...
What should I say?
What you've been saying is good,
or how about...
"Finish what
you couldn't last year?"
"What you couldn't last year?"
What happened last year?
- It was nothing.
- What is "nothing"?
What was it?
Hayeon...
Before Hayeon slit her wrist,
she left a goodbye to her brother.
But cutting your artery
isn't really easy.
Why did she attempt suicide?
Family, grades, and anxiety...
The list goes on.
But the trigger was
bullying at school.
Bullying?
Was Hayeon bullied?
Do you remember
what Eunho told us?
I mean...
they got kicked out for a kiss?
The older student was a girl, too.
Yunju kissed a girl.
Hayeon's mouth kicked her out.
This will help you understand.
(Hayeon's class president again?)
(Teachers should know
this is insane.)
(Her tattletale kicked Yunju out.
Damn loudmouth.)
(I heard her mouth sent someone
to the looney bin.)
Who posted these?
The one you know.
Someone I know?
It's a user agent record.
The poster uses
a Samsung Android phone.
The model is the Galaxy 22.
It can't be.
Jieun could never do this.
Someone with the same...
I've cross-checked
the IP and MAC address.
Hayeon probably can't,
but a hacker like Rat
can track this much.
(...sent someone
to the looney bin.)
No...
Jieun is not a mean girl.
Think however you want.
The truth will remain the same.
Should we
stop?
How pathetic.
You take revenge for your rage.
Don't use your sister
as your excuse.
Do it for yourself.
Stop this nonsense about
"letting your sister
rest in peace."
Don't run your mouth
like you know Jieun.
I'm her sister.
How agonized she was
and what she felt when she died,
I know best.
Who do you think you are,
telling me what to do?
I wonder if you can say that
after seeing this.
Why is this fake will
on Jieun's phone?
The will was fake,
but the message wasn't.
The message on the will.
I got it from Jieun's post.
This is...
Jieun's post?
Hello, stranger.
Everyone whom
I can talk to is gone.
Today, my sister told me
I have to testify at the court.
His lawyer will harass me
and humiliate me.
I felt disgusted.
I'll help you.
Just go and deny everything.
I don't want to say that.
I can feel my sister
forcing a smile.
Let's just give it...
No!
I don't want to
talk about it anymore!
I feel so useless.
I've always been
a burden to my family.
To my sister. To my mom.
Mom died because of me.
We're poor.
Mom had to work two jobs
for my sister and me.
Mom worked too hard and got ill.
That's why she died.
If I hadn't been born,
Mom wouldn't have died.
It's all my fault.
Bye, stranger.
I won't be in this world
by the time you read this.
I've been thinking about suicide
like a habit.
I'm so exhausted.
I had nightmares every night.
In my dream,
I walk down a barren desert
and get chased by a dark monster.
I relentlessly run and shout,
but no one helps me.
The dark monster rips
and crush me into pieces.
Its laugh is haunting.
But the most haunting part is that
I'm also laughing in my dream.
I have no place to run now.
Bye, stranger.
These might be
my last words to you.
It's so hard.
I don't want to pretend
nothing is wrong
in front of others.
Especially, in front of my sister.
I know she's acting.
It's better to end this once
and for all
rather than us living an act.
If I leave,
my sister can be happy.
No...
I can't...
How can I be happy without you?
My name is Yun Jieun.
I'm the girl
who caused a commotion online.
If you don't know me,
search me online
and you'll know quickly.
I didn't write
my name with a motive.
You don't know me.
I don't know you after all.
All I wish for is
a stranger to listen to my story
and to prove that I once existed.
Even if I don't exist
when you read this.
You knew everything
from the start.
This journal and everything.
Yes.
Why did you hide it until now?
- You didn't request it.
- But...
Why would I without a request?
If you wanted
the truth about Jieun,
your request would be different.
But you wanted revenge, not truth.
This might offend you.
You and I are similar people.
We thrive in solitude.
Instead of dull social activities,
we want to make
the best out of time.
We pass on gatherings to read.
But Jieun...
Jieun's not like you.
She feels peer pressure.
She wants to blend in with others.
She uses others as examples
to pretend to have common grounds.
She probably dated Eunho
for the same reason.
But without knowing
that could hurt Eunho more.
What do you mean?
Jieun dated Eunho
she didn't even like?
This is only an assumption.
I think Jieun liked someone else.
- Someone else?
- She deleted all the photos.
Except one photo of her friend.
Who do you think Jieun liked?
Did Jieun like Sumin?
I'm sure she was confused,
not being able to
understand her feeling.
When Jieun dated Eunho,
she probably did
because she knew
Sumin can't date her.
Finding out
she had hurt Sumin instead,
Jieun chose to walk away.
I thought I knew
everything there is about Jieun.
I gave up my life for Jieun.
I wanted to give Jieun
a comfortable life.
For your sister...
Do you think Jieun liked
how you sacrificed for her?
Her phone had one more photo
other than Sumin's.
We have no time.
It's time for revenge.
You told me the truth.
I thought you wanted me to stop.
Stop? Why would I?
I don't want to stop you.
I'm only a knife.
You decide how you want to use me.
Get a grip!
Don't die.
You can't die.
I should stop.
- PI Seol?
- Hop in.
Seatbelt.
Hayeon gave
girls' information to Rat.
Rat used it to blackmail
and take advantage of them.
I don't think Hayeon knew
her brother's vile crime.
She probably thought
it was his kink.
He'll get
at least 30 years in jail.
Will Hayeon be okay?
She's probably shocked
by her confidant's betrayal.
But she'll be fine.
She's tougher than we think.
Now, let's talk about
the 200K revenge fee.
Feel free to share your plan.
How about 20K per year
for 10 years?
Not happy.
How about 5K per quarter?
Not happy with that, either.
What do you want then?
You said you can
customize the plan.
How about being my assistant?
Your assistant?
Like Holmes and Watson.
I think you'll do pretty well.
How much do I get paid?
I'll deduct 10K per month.
Then, let's make it 15K.
I need food on my table.
Also, guarantee
a five-year contract.
15K per month for 5 years?
You're robbing me blind.
It's up to you.
I'll look for another job.
Okay.
Okay, deal.
Also...
- What is it?
- I hate being late.
Move under my office.
Move just like that?
Without the landlord's approval?
- It's my building.
- What?
I have many empty units.
Pick whichever.
I heard you're
a detective fiction fanatic.
Is there a special reason
for loving detective fictions?
As a boy, instead of textbooks,
I read the books of Agatha
Christie and Conan Doyle.
Actually,
my dream was to become
a great detective like
Sherlock Holmes or Hercule Poirot.
Somehow, I'm a businessman.
Of course, I still dream
of being a detective.
It has a special place
in my heart.
Is there a book
you'd like to recommend to me?
The Sherlock Holmes collection?
by Chan Ho-kei)
(Agreed by
Crown Culture Corporation)
(Second Sister)
(Shocking news!
Jieun jumped from her balcony!)
(She killed herself!)
("A high school girl jumped...
Police are investigating")
(What do we do?)
(Answer quickly.)
(Don't worry.
It's not our fault.)
(But she jumped because of us.)
(We essentially killed her!)
(We did not kill anyone.)
(We just told the truth as it is.)
(Get it out of your head.)
(Are you there?)
(Hold on. I'm coming over.)
Stop!
Hello, I'm...
What do you want?
PI Jung told me about you.
So early in the morning.
Totally ruined my sleep.
Sir, are you Seol Jungyeong?
I'm not your sir.
Call me PI Seol. Sit.
Explain in five minutes.
- What?
- Miss.
I need a rundown before I accept.
Right, sure.
Four months ago,
my sister was groped in a bus.
The groper was Shin Jeongman.
(Man in His 40s
Jailed for Molestation)
After he was sentenced
six months in prison,
I thought it was done and dusted.
But then...
Shin's niece claimed his innocence
by posting a long statement
on an online forum.
It said Shin simply lectured
my sister for smoking
near a bus stop.
It also said out of spite,
my sister wrongly accused the man.
It even stated
a vile rumor at my sister's school
about my sister being an orphan
who hangs with delinquents
and that she's a sugar baby
who does drugs.
(Views)
The statement got
reposted everywhere,
exposing my sister's school
and her photos.
People only listened to the niece.
They bashed my sister
in all kinds of ways
with vicious, uncalled-for words.
Then, I realized.
Anyone can easily be
a demon online.
(High Schooler Commits Suicide
from 12th Floor)
Because of the anonymous post,
my sister was torn to pieces.
Because of the niece's post,
my sister eventually
killed herself.
After her suicide,
I hired a PI to find the niece
who posted.
Shin Jeongman has no sibling.
He's an only son.
I found out
Shin can't have a niece.
Then, the PI said this case needs
an ingenious hacker as a PI.
He recommended you.
Sir...
PI Seol.
I have to find the poster.
I have to know why she posted
and had to force my sister to die.
I must ask.
I'm going to decline.
- Why?
- It's too easy.
Too easy?
A few clicks
on the keyboards will do.
I won't waste my precious time
on a dull case like this.
A dull case?
Yes, dull.
That's below the belt.
Time's up now.
Can you leave?
I have to have breakfast.
Aren't you leaving?
Starting up as a small software
company in Silicon Valley,
SIQ is a global
IT venture company today.
It has intrigued many people.
First, SIQ was
founded by three people
including you, Steven.
Two other founders are
publicly representing the company,
but you work
mostly in the shadows.
Is there a special reason?
Excuse me, PI Seol!
Hello.
If you can pay 20 grand,
I'll do it.
- Where did you find my number?
- Can you pay?
I'll pay.
But you must
find her in one week.
Okay, I'm in.
We're on the same boat.
I'm going to talk real with you.
By the way, why did you
suddenly change your mind?
This case seems
more interesting than I thought.
It's the log-in record
of the online forum.
Give me some room!
Look at this.
It shows the same screen.
This is the log-in location.
This is ID kidkit727's IP address.
I tried to track the IP...
Do you know what IP is?
I'm not a dummy.
I guess.
I tracked the IP address.
It's in Luxembourg.
It can't be tracked.
Then, we can't find her
with the IP address.
I could try with her email, but...
She signed up
with an untraceable account.
I don't know what she's hiding,
but she's a pro.
Then, how do we find her?
We'll have to dig into Shin
to see how connected they are.
(Am I... a murderer?)
(Am I a murderer?)
(You're doing it again.
Stop this self-sabotage.)
(It was her choice
to kill herself.)
(It has nothing to do with you.)
(I ain't sorry for someone
who throws people under the bus.)
(What if the police find us?)
(I swear the police
can't find us.)
(They have no evidence.
How can they find us?)
(You know how good I am.
Don't worry a thing.)
(I won't.)
Shin and kidkit727
have no connection.
How can that be?
I checked
Shin's cell and computer usage.
He wasn't tech-savvy.
He would be online
to play a game of Go.
His wife, too.
They're not hacker materials.
From the way
kidkit727 wrote the post,
did you not notice
anything peculiar?
"Peculiar?"
It read like a defense
written for the defendant.
The legal representatives for Shin
and kidkit727
might be connected.
I'll dig deeper into this.
But I have a more promising lead.
Yun Jieun, your sister.
I want to check
your sister's cell.
(Student Card Yun Jieun)
(Yun Jieun, I know you well.
I've been watching you.)
(You just wait.
I'll yank your mask off.)
(I'll show the world
what a vile wench you are.)
(So don't even think about
(making excuses
for your sorry ass.)
(Girls like you only learn
the hard way.)
(Scared? You should be.)
(Because I'm about to
spread this photo around.)
(You'll be the trash in no time.)
(People who know you
will find out I posted the truth.
(Bullcrap.
Jieun, I'm proud of what I did.)
(You lied to frame a person.
I'd die than be shameless.)
(Sender Jieun:
Do you want me to kill myself?)
What are you doing here?
Things are looking up.
- I got another IP address.
- From where?
Korea.
Then you can get
the exact location.
She slipped this time.
But she isn't dumb enough
to show herself.
We have the IP address.
Why can't we get her location?
She sent four emails
and gave away three IP addresses.
The first two have
the same address.
The last two don't.
Different Wi-Fi was used
to access internet.
She kept changing locations
to send the emails.
Can we narrow it down to an area?
The first two were
sent in Hanam-dong.
The third one, in Oksu-dong.
The fourth in Seongsu-dong.
But the Wi-Fi was logged in
by a prepaid cell.
We can't track it down.
- Then...
- But...
One of them can be found easily.
"One of them"?
Two people are behind kidkit727.
How do you know that?
Well, let's call one, "Seven".
Based on the ID, kidkit727.
I'll call the other one, "Rat".
Based on the email,
"rat10934@yandex.com."
Seven is probably the mastermind
who wrote the post and emails.
Rat probably provided
technical support,
but you might ask,
"On what grounds?"
The posting
and emailing
were executed so differently.
One falls short a lot.
Then what do you mean
we can find them easily?
We find Galaxy users
from Jieun's school.
Seven is one of them.
But wait.
Are you saying one of
Jieun's classmates did this?
The answer is in Seven's email.
Think about it.
Why do you think Seven rashly
blackmailed Jieun?
She could've waited for Rat
to send it more stealthily.
It's simple. Seven was impulsive.
Seven couldn't hold it in.
What is the last sentence
of the first email?
"You'll never smile again
after this."
People give away information
when they talk or write.
Like a habit they don't notice.
Seven clearly loathes your sister.
Whether it's for Shin's case
or personal reasons.
Your sister was deflated, right?
She was.
She didn't seem fine
after our mother died last year.
Seven must have secretly liked it
when Jieun felt
miserable and broken.
But that wasn't enough.
Look at the email.
"Girls like you learn
the hard way."
"You'll never smile again
after this. Wench!"
Seeing "again" being emphasized,
Seven must have seen Jieun
smiling
or feeling at ease.
Seven couldn't take it
and sent the email.
To agonize your sister.
That's
all it took?
The worse the malice,
the pettier the trigger.
Considering it was
to bully your sister,
the email is a lot less polished
and more reckless
compared to the post.
You can tell
by the attached photo.
They're just being teens.
Being teens?
The photo was
a blackmail to Jieun.
To me, she's just
cozying up with the redhead.
Don't you think?
If Seven was to
socially kill Jieun,
a more suggestive photo
would be here.
Let's summarize.
Seven could've
checked in on Jieun daily.
Seven rashly blackmailed Jieun
with a half-ass photo.
Considering that,
Seven is your sister's age.
If Seven was
to check in on Jieun daily,
Seven very likely
goes to the same school.
Then how do we know
it's a Galaxy user?
Do I have to explain every detail?
Do you see "Galaxy mail" here?
That says it's a Galaxy user.
If we narrow the students
down to Galaxy users
we get our suspect.
But so many students
use Galaxy phones.
Legwork is the only way.
(I actually didn't
tell you something.)
(I sent an email to Jieun before.
Will this be a problem?)
(Did you send it
like I told you to?)
(So that it can't be
traced back to you.)
(I did.)
(Then don't worry about it.)
(I gave you
a prepaid Wi-Fi password)
(that's untraceable.)
(Okay.)
Seven is one of them.
How did you narrow it down?
I checked every log-in
in the school intranet.
Do you remember any of the names?
(Na Jihwan Park Junghwan
Min Juno...)
Any nicknames?
I don't recall.
Weren't you close to your sister?
How could you
not know her friends?
Do you have any photos?
I might not know their names,
but I know the faces.
I prepared them
because I knew you'd say that.
I worked all night
to hack their phones one by one.
I'll flip through.
Wait.
I remember her.
So she came to the funeral?
I think she came alone
around 8 p.m.
A friend who came to the funeral
couldn't be the culprit, right?
It could be the opposite.
This is the last one.
Her name is Lee Sumin.
The one you remembered is
Kim Hayeon.
They've been in Jieun's class
for three years.
So definitely...
They both...
They both came to the funeral.
Both of them? The boy, too?
His name is Ku Eunho.
It was his first time
being in Jieun's class.
I think he's dating Sumin
who is beside him.
But he uses an iPhone
instead of Galaxy.
They visited my home.
It was Christmas Eve
two years ago.
They brought her home
since Jieun got sick
at their party.
Mom had to look after
Jieun all night.
It's worth looking
into this girl, Sumin.
Whether she's the sender or not,
she can tell us
about Jieun's school life.
Hey, you scared me.
("We won't forget you")
Has the school investigated
the forum post about Jieun?
I wonder if any students
were involved.
We didn't do any investigation.
Parents resisted.
It was also a sensitive matter
for the school.
I see.
Almost forgot...
you teach Korean, right?
- I do.
- I'd like to see Jieun's essays.
I want to know
if Jieun hadn't shared
any thoughts before leaving us.
I didn't notice anything special.
Give me a few minutes.
I'll grab her essays.
It's her essay collection
for this year.
It's five notebooks.
Thank you.
Would it be okay
for us to take them?
Of course, you can.
Also, would it be okay
to say hello to Jieun's friends?
To thank them
for coming to the funeral.
Were you close to Jieun?
You could say so.
You brought Jieun home
when she got sick.
Remember?
Has anyone hated Jieun,
or could have spread
malicious rumor about her?
Princess.
It has to be Princess.
"Princess?"
A rich girl called
Jo Minji in my class.
We call her Princess
because she's
surrounded by servants.
Her clique controls
the classroom vibe.
You lose all your friends
the moment they isolate you.
Instead of being targeted next,
we say nothing.
Was Jieun ever targeted?
She was never targeted.
But the last time we voted
for a field trip location,
Princess nominated a theme park
but Jieun voted against it.
So going to a palace
won by one vote.
I'm sure Princess was ticked off.
She talked bad about Jieun
to students in other class.
She's such a spiteful, mean girl.
But no evidence says she did it.
They had a fallout,
but Princess never bullied Jieun.
Princess also
went to Jieun's funeral.
She came to the funeral?
- Princess did?
- Did you not know?
I saw her standing alone
at the door on the day.
Did you say hi?
No, we're not close.
Also, Sumin doesn't like her.
They treat each other
like strangers.
You two and Hayeon were
the only students at the funeral.
Hayeon? Kim Hayeon?
Not Princess?
Yes, her hair is about this long.
Her glasses have a red frame.
That sounds like Hayeon.
- What's wrong?
- No, nothing.
It's just... I didn't know
Hayeon and Jieun were that close.
I'm sure Jieun was grateful
to see anyone of you.
I'll give you my number.
Tell me if anything comes up.
Sure.
Thanks.
I said, I'll lead.
If you jump in again,
I'm off this case, got it?
What did I do wrong?
I just remembered
they brought Jieun home.
I was softening up...
Because of you,
I missed the key question.
What was the question?
You want to get to
the bottom of that.
Look at the date on the photo.
"2021, December 24th."
Was this photo
was taken on the day.
Sumin brought Jieun home?
Kids would've talked about it
if you hadn't jumped in.
Are you still proud?
How was I supposed to know?
You could've let me know.
Don't just blame me for it!
They might read our intention.
Can you be warm and fuzzy
if you had known it?
Sorry.
We're Jieun's family.
Are you Jo Minji
in 12th grade, Class 1?
I am... Why?
Jieun borrowed $100, right?
It was in her diary.
Sorry for the delay.
What?
I never lent her money.
Aren't you Jo Minji?
I am, but I never lent her money.
Right...
Is there another Jo Minji
at school?
Yes, one more in Class Four.
I must have been confused. Sorry.
Jieun talked a lot about you.
She talked...
A lot about me?
She wanted to
apologize for something.
She even asked how she could.
Apologize to me?
I guess Jieun never told you.
Last year, everyone wanted
to go to the theme park.
But Jieun voted against it.
Jieun also wanted to go,
but she didn't have
enough allowance.
I mean
if she didn't have money,
I could've lent her some.
She was hesitant because
she'd borrowed from others.
And since Jieun
never spoke to you,
I'll apologize for her.
No, you don't have to.
We thought Jieun was bullied
by someone who held grudge.
Since you were in her class
would anyone do such thing?
About Jieun...
My teacher told us to say nothing.
So I have no idea
what the reporters
or others heard.
Are you Hayeon?
I'm Jieun's cousin.
This is Jieun's sister.
Hello.
We came to pick up her stuff
and decided to thank her friends
for coming to the funeral.
I see.
Were you two close?
She never talked at home.
We weren't close.
She always did homework there.
We'd say hi to each other.
So I wanted to
say my last goodbye.
By any chance
did anyone hate Jieun?
Sorry, but I really
wasn't close to her.
Right, sorry for asking again.
I don't know exactly.
But from what I see,
Sumin and Jieun had a fall out.
They were so close
that they were inseparable.
But they didn't even
look at each other later on.
They avoided each other
on purpose.
They started doing that
all of a sudden.
Do you think Sumin spread
bad rumors about Jieun?
I don't know.
But... when friends fight,
they do terrible things.
And these days,
everyone knows
how to spread bad rumors online.
It's so easy to distort the truth
and attack someone.
Can I get my phone?
Nice service.
Did you check the student card?
Yes, to avoid mishandling
all the phones and tablets.
Right...
See you.
Actually, Jieun and I...
We used to go out.
Although it
only lasted two weeks...
Sumin must have made it
awkward to tell before.
I had a crush on Jieun
for a long time.
I finally plucked up the courage.
We started going out.
But not even a week later,
Jieun was cold to me.
To me and to Sumin, too.
Like they weren't friends anymore.
Then, she broke it off
after two weeks.
Sumin was really
nice to me back then.
Sumin and I have been friends
since kindergarten.
But it turned out
Sumin liked me all along.
As soon as Jieun told Sumin
about dating me,
Sumin wrote Jieun off.
Sumin was mad at Jieun
for stealing her crush.
Sumin was anguished.
After that...
They kept avoiding each other.
I drove wedge between them...
I couldn't help Jieun
when she needed help the most.
It's all my fault.
It's no one's fault.
Don't kick yourself.
You said you couldn't help her.
What happened at the karaoke
on the Christmas Eve?
How do you
know about that?
By accident
while organizing Jieun's stuff.
We don't know the details, though.
That night,
Sumin and I bumped into
an older friend from school.
The friend said Jieun was with.
Eunseong High boys
who are in a band.
They're not just a band.
They're infamous
for drugging girls
and pimping them out.
I got so worried
while having dinner with Sumin.
So I sneaked into a bathroom
to call Jieun.
Jieun's tongue was all loose.
She couldn't answer my questions.
Something bad was going to happen,
so I told Sumin everything...
I said Jieun was in danger.
What did Sumin say?
She kept ignoring me.
But I kept telling her.
So she suggested we go,
and we went out.
Did you find Jieun at the karaoke?
No, I saw some guys leading Jieun
towards a motel.
We jumped in and yelled,
"What do you think you're doing
to a high schooler?"
When people started looking,
they left Jieun and ran.
Imagine if you hadn't found Jieun.
It was way back, but thank you.
Don't mention it.
Only you and Sumin know
about what happened
that night, right?
But then...
- Damn, look at that picture.
- This guy, Choi Jaewon.
He's one of
the band member's brother.
I think he spread the rumor.
Which class is Jaewon in?
He doesn't go here now.
He was shipped off
for something else.
"Shipped off?"
It means forced transfer.
Right, forced transfer.
I almost forgot.
When you talked about Hayeon,
you seemed to have things to say.
Sumin pointed Princess,
but I say Hayeon's more likely.
Princess runs her mouth,
but she doesn't do that in hiding.
Hayeon's sneaky enough
to tattletale someone's dirt.
Did Jieun have a beef with Hayeon?
They didn't.
Hayeon did
the exact same thing before.
This girl, Yunju,
went to my school.
Hayeon told a teacher about Yunju
kissing an older student
on the rooftop.
Yunju and the student
got kicked out.
I mean...
they got kicked out for a kiss?
The older student was a girl, too.
Rules are strict
as with all Christian Schools.
Also, Hayeon's always like that.
She's always right.
She thinks she can do no wrong.
To her, it was sinful
for a girl to date another girl.
It goes the same with
Jieun's case.
When Hayeon knew.
Jieun was the girl
in the Christmas rumor,
Hayeon must have become biased.
Hayeon probably spread rumors
about Jieun
hanging out with the band boys.
That's only your assumption,
right?
That's true, but...
I suspect Sumin the most.
She has a motive.
She knows about the photo well.
What we need is physical evidence,
not a hunch.
Do you remember I told you
kidkit727 moved locations
to use Wi-Fi?
I didn't tell you something.
A reference number is recorded
by the provider
when Wi-Fi is used.
The MAC address,
short for medium access control.
So in a nutshell,
for 1,000 smartphones in Korea,
1,000 MAC addresses exist.
If we find a Galaxy phone
that has kidkit's MAC address,
we can find kid kit.
Let's go back now and check.
Listen until I finish.
I've already checked.
What?
I set this device
to check MAC addresses
whenever we came across a phone.
The culprit was with us
all afternoon.
Why didn't you tell me earlier?
I'm 99 percent sure
one of the students
we met is the culprit.
But wait until
I'm 100 percent sure
to see all my cards.
I'll make the culprit willingly
show up in front of you.
(I know you're busy.)
(But Jieun's sister
was at school.)
(She asked a lot of things
like she knew something.)
(Sorry I was in a meeting.)
(What did she ask?)
(How Jieun was at school
and with her friends.)
(Did she come because she knows
what we did?)
(I'm so worried.)
(Don't waste your time worrying.)
(No one can know what we did.)
(Okay.)
(Are you busy tonight?)
(I need to see you and talk.)
(I can't this week.
I'll text you later.)
I came for my ID.
- Here.
- Thank you.
Did you find the culprit?
No... Not yet.
What did the police say?
Even if they find the culprit,
they can't really punish her.
What kind of response is that?
So irresponsible.
I want to take the afternoon off.
Is that okay with you?
Why? Is something wrong?
No, I have to go somewhere.
Okay, sure.
Welcome.
- Two hot soups?
- No.
I came to eat alone.
Did you two fight?
PI Seol is as picky as anything.
It's not what you think.
I was talking about the case.
I assumed he declined your case.
Did he talk about my case?
Two types of people
come to PI Seol.
A client and a gangster.
So you knew.
- Welcome.
- Hi.
PI Jung.
Hey, Soeun.
What a nice surprise.
- Did you have work in the area?
- Yes.
I came for your case.
My case?
I came to talk to
PI Seol about things
he had asked me to investigate.
He's a jerk
for telling me to come
all the way here.
Saying sending files
online isn't safe.
What did you investigate?
The redhead.
The guy in your sister's photo.
I know you're inside!
You investigated the redhead.
What's the result?
I did, but I found nothing.
He's been in a juvie for a year
for theft and assault.
- And?
- And nothing!
And I'm not done yet.
I'll let you know, so just leave!
Liar.
PI Jung investigated "things."
If it was just about the redhead,
he would've said,
"a person" or "a thing."
PI Jung's choice of words
has nothing to do with me.
PI Jung also said,
you asked him to come here
since sending files
online is not safe.
If it was just about the redhead,
a phone call would've done it.
PI Jung came
to hand you a physical result.
Be honest.
What are you investigating?
And what is this file?
How did Kim Yeonwoo meet the girl?
My firm holds
a free legal workshop
for the local community.
People also seek legal advice
during the workshop,
and our apprentices or
paralegals jump in.
That's how Yeonwoo met the girl.
He wasn't much of a lady's man.
The young girl was nice to him.
He must have forgotten his duty
as a paralegal.
To think now,
she must have
approached him to get information.
What information did
Yeonwoo give up?
Public stuff.
Like Shin's testimony
at the hearing.
Anything private was
our strategy to defend Shin.
Like his relationship
with his wife.
Any assumptions favorable to Shin.
Also, the information didn't
invade anyone's privacy,
including Shin's.
You fired Yeonwoo for this.
Don't worry about
being liable in any way.
Good.
Did Yeonwoo ever
mention the girl's name?
I'm trying to remember...
Yes!
He said, "Lee Sumin."
Why didn't you tell me earlier?
Sumin is the culprit.
This isn't decisive evidence.
If this isn't decisive,
then what is?
I told you.
We need physical evidence,
not a hunch.
How do we know
"Lee Sumin" in the conversation is
the one we know
or someone disguising as her?
PI Seol.
Do you even want to
find the culprit?
This was with the books
the teacher handed to us.
The unreturned
first half of "Anna Karenina."
I'm returning this
to school tomorrow.
You're going back there?
Come to the school
by noon tomorrow.
I'll show you
who the real culprit is.
It's been ten years
since SIQ was founded.
How did it all start?
Bullcrap.
I never rented a book.
How can I owe late fee?
You printed documents.
You owe $12.
Pay before the break.
First 50 sheets are free.
You wrote the rule, remember?
Black and white only.
That's not fair!
Did I make the rule?
Teachers did.
What do you want from me?
Hey.
- Hi, Soeun.
- Hey!
- Hi, Eunho.
- Hey!
The school feels scattered today.
Something is wrong
with our network.
The provider
couldn't find out why.
The library computer
is getting errors.
Sumin was told to return a book
she didn't borrow,
so we came.
Hi.
Your teacher... Can you call her?
Quick!
What's going on?
I almost missed this.
This was inside this book
Jieun borrowed.
This is...
This is Jieun's handwriting.
Then...
Is this... Jieun's will?
She left a will after all.
We just missed it.
(By the time you read this,
I won't be here)
This is the first half.
The rest must be in the next book.
(Hello, stranger.)
(I won't be here.)
(I think of death...)
(pimped out...)
(doing drugs...)
"Did?"
Sentences don't add up.
The first one also ended awkwardly
after "doing drugs."
The middle piece must be missing.
Does "Anna Karenina"
have a middle part?
No, it only has two books.
Can you check Jieun's record?
Sure, one second.
(I want the world to know...)
(prove my innocence...)
I found Jieun's rental record.
But other than "Anna Karenina,"
she hasn't rented any books.
- None?
- Yes, none.
Two books were all she rented.
Maybe, she kept it
in another book.
Like a textbook.
Ma'am, we should go home.
Please take a closer look
at places like Jieun's locker.
Okay, I will.
Let's head to my office.
I have to show you something.
- PI Jung.
- Soeun.
- Nice to see you again.
- What are you doing here?
He's my temp.
He dragged me in.
He owes me until I'm done.
Says PI Seol.
- Did it record?
- Of course.
It's nice and crisp.
It's looking good.
Okay.
- That's...
- Eunseong High School.
It's time to reveal the culprit.
Someone will go to the shelves
and pick up
"Crime and Punishment."
She's
kidkit727 we've been looking for.
Is that...
Is that Jieun's will?
Hey, calm down.
It's fake.
"Fake?"
It was Jieun's handwriting.
Flawless, right? I copied her.
I had so many samples.
It only takes
a few days of practice.
To fool even her family.
You confirmed that it's hers.
The suspect would believe
her sister's words.
Why are you doing this?
Is this a game?
Are you having fun?
Because it's the only way.
Rat is a hacker
who left nothing online.
The rest was circumstantial.
How else do we catch the culprit?
Why did you collect evidence then?
We must narrow the suspects down
to set a trap.
Is it wise to dump a fishing rod
without knowing
if there's any fish?
Then why is Hayeon the culprit?
The truth is...
Jieun never rented
"Anna Karenina."
I tampered
with the rental records.
I also had stolen
the book secretly.
Why "Anna Karenina" in particular?
It looked unpopular to students.
It's thick.
If "Anna Karenina" was a bait,
"Crime and Punishment"
is the hook.
Then, the second
and third pieces...
You placed them
when you went to the shelves.
Bingo.
It's as good as a confession.
Can't you see?
I added both "Anna Karenina"
and "Crime and Punishment"
in the records.
But what did Hayeon say?
But other than "Anna Karenina,"
she hasn't rented any books.
Jieun hadn't rented books
other than "Anna Karenina."
That was a test
for all the suspects.
So you brought Princess and Sumin
with network error, too.
Bullcrap!
I never rented a book.
How can I owe late fee?
Sumin was told to return a book
she didn't borrow,
so we came.
A play needs its actors.
If Hayeon is kidkit727,
how did she get the photo?
I'm sure Hayeon doesn't know much
about the karaoke incident.
The forum post only said,
"She drinks with the band bums."
The email only had the photo
without details.
I can tell she wrote the post
based on the photo.
It wasn't important to her anyway.
Then, the photo...
The band member's brother,
Choi Jaehwan. I bet he leaked it.
Damn, look at this picture.
Think about it.
Hayeon can steal student data
anytime she wants to.
Charge this.
It's called juice jacking.
You steal data
while charging the phone.
How can a teenager know
how to do that?
Rat must have told her.
It's a hacker.
I don't know why.
But Hayeon has been collecting
student data all along.
Even if Jaehwan
did not go to the library,
he would have
showed it to his friends.
And the photo
would have been leaked
if any one of them
went to the library.
How long have you been
suspecting Hayeon?
You basically targeted Hayeon
with this set-up.
The fake rental record
and the network error...
Ever since
I met her at the library.
Do you remember
what I asked everyone?
Has anyone hated Jieun,
or could have spread
malicious rumor about her?
It has to be Princess.
Sumin mentioned Princess
when asked.
I have no idea.
Princess had no idea.
I say Hayeon's more likely.
Eunho suspected Hayeon,
but Hayeon said...
But... when friends fight,
scary things do happen.
A completely different take.
And these days, everyone knows...
How to spread bad rumor online.
What's your point?
I asked if anyone hated Jieun
not to find kidkit727,
but someone else.
Someone else?
A boyfriend stealer
who hangs with band bums.
The girl is also an orphan.
Who is this anonymous student
who told Shin about this?
But Shin's niece
doesn't even exist...
Hayeon's the only one
who knows he doesn't have a niece.
Congrats. You found kidkit727.
Is she burning that?
Hey.
What are you doing?
Hey...
What the hell?
She was laughing.
She was laughing!
After doing that monstrous thing.
She burned Jieun's will
without even opening it!
She doesn't have
an ounce of guilt.
- After making my sister die.
- Put down the knife.
I don't care
if you kill her or skin her alive.
Not with my knife.
Leave me out of it!
Wait.
Why?
Why are you stopping me?
Do you want revenge?
Yes.
I'll rip that murderer
into pieces.
Okay.
Then let's calm down and talk.
Talk? About what?
Call the cops?
If you talk about the law...
You know the law can't help.
Then do we let her be?
She killed my sister!
So take revenge.
But it'll be hard alone.
Think of this as a warranty.
It's not cheap.
But I guarantee you'll be happy.
A discounted price of 200K.
You've seen my bank account.
Is this on purpose?
Revenge is post-paid
unlike investigation.
I'll design a custom payment plan.
Don't worry a thing.
Why are you doing this?
I believe in tit for tat.
If you accept my offer...
I'll gladly be your knife.
Fine.
I'll take it.
But you have to kill them all.
Everyone who had
their hand in this death.
(Jieun's sister
came to school again.)
(She even found her will.
I freaked out.)
(Her will?)
(Yes, her will.)
(What did it say?)
(Who knows? I got rid of it.)
(Reading it would
complicate things. I burned it.)
(Good job.)
(Are you free tonight?)
(Dad is on a business trip
to the US.)
(He's away for ten days.
I understand if you're busy.)
(I'll see you tonight.)
Your stocks are worth
one million dollars.
How does it feel to be rich?
Is it the first day of your break?
Yes.
(The truth about
the girl's suicide.)
(You're all murderers.)
(You're all murderers.)
(Her death...)
(sexually harassed...)
(She was framed.)
(It's nothing to die for.)
(He had no siblings.)
(He was an only son.)
(Then some niece showed up.)
(Droned on and on.)
(kidkit7270)
(Go to the online forum now!)
(Someone posted about Jieun!)
(What do we do?)
(Don't worry. It's all nonsense.)
(They know Shin Jeongman
doesn't have a niece.)
(It's an idle
conspiracy theorist.)
(Read the replies.
No one will believe the jerk.)
(Can I see you tonight?)
(Sorry I have
too much work today.)
(I'm so busy
I clock in on weekends.)
(Hard disc files...
led to her suicide.)
(It's about someone's life.)
(The back file I got
is incomplete.)
(Don't bother
tracking my IP address.)
(The hard disc
must have dirty crap.)
(This is interesting!)
(Too bad for the dead girl.)
(I want the truth now and badly.)
(Should the police
investigate it again?)
(The fake niece instigated!)
(Hey!)
(The forum is blowing up!)
(Did you delete
the files I sent you?)
(If it gets leaked, we're over!)
(What files?)
(Stuff I hoarded at school.)
(The photos and videos
I stole from others' phone!)
(Some lunatic is babbling about
hacking your computer!)
(Do you believe that?)
(What if the lunatic exposes you?)
(Then it's over for us!)
(You and I become murderers!)
Hello.
(No Caller ID)
Hello?
Murderer.
(No Caller ID)
Who is this?
If you call again,
I'll call the cops.
Psycho.
(No Caller ID)
(Start calling!)
(Did you all call? It was a girl.)
(Is she the instigating
fake niece?)
(Whose badmouthing
led a girl to die?)
(We should do the same.)
(Death to death!)
(Get her accomplice, too!)
(Someone call the police.)
(Your account
must have been hacked!)
(I just saw it, too)
(I'll keep watching.
You don't have to worry)
(I'm so scared.
Can we talk on the phone?)
(Sorry. My boss is beside me.)
(I'll call you later.)
Murderer.
Murderer.
Murderer.
Murderer.
You want her to die
for what she did.
Of course, I don't kill.
I'm not a hit man after all.
But if she kills herself
it's most ideal, right?
Are you saying
you'll disguise
a murder as suicide?
No, more like
what your sister did.
I'll make Hayeon kill herself.
Not because of a threat,
but herself.
If you tackle one's weakness,
it's more than possible.
Weakness?
Hayeon lives with her stepdad.
Her mother remarried
when Hayeon was little.
She cheated and left home,
abandoning her young daughter.
Who is this boy?
Hayeon's brother, Kim Hajun.
He was sent to an orphanage alone
when his mother remarried.
That boy is Rat.
Her stepdad is her legal guardian,
but she was always
closer to her brother.
He was Hayeon's only blood.
I'm sure they connected
since their mom abandoned them.
Anyway, they met often
behind their step dad's back.
If we tackle Hayeon's brother
who is her only
reliable confidant...
Suicide?
It's more than possible.
Guaranteed 100 percent.
You look entertained and excited.
I told you it'd be interesting.
Wake up.
Wake up! It's time to work.
Hello?
We'd better not say
anything at first.
It's your turn.
Your voice will be modulated,
so don't worry.
What do I have to say?
Anything?
Except about Jieun.
Hello?
Murderer.
Nice job.
Let's go rough on her this time.
Who are you? If you call again,
I'll call the cops.
Psycho.
Normal people get annoyed
by a late night prank call.
But guilty ones get shaken even
by the sound of the front door.
Worrying about the online world
finding out what she
and her brother did,
Hayeon's a nervous wreck.
Are people
talking about it online?
(You're all murderers.)
Are you Super Conan, the poster?
Who is Zerocool?
I am them.
But I am not.
Then this website here...
It's a fake site I made.
I'm controlling
Hayeon's phone and laptop.
What if Hajun shows up,
thinking it's weird?
He's so busy at work.
I bet he has no time
for his sister.
At this rate...
Two days max.
It's time for our first bullet.
What? Are you shooting a gun?
Did you snooze
in literature class?
It's a metaphor.
I thought it might be real
because I can't tell
if you're a criminal or a PI.
I mean...
It's as effective as a gun.
Murderer.
I just heard...
Isn't it cool?
It's an induction speaker.
Ultrasound doesn't
spread in the air.
So this can shoot sound
to an exact point.
As if,
- Murderer.
- It's a voice in your head.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
Murderer.
(Hajun! I'm so anxious.
Text me!)
(Not read.)
(The truth
about the girl's suicide.)
(I'm using another account.
This will be my last post.)
(I unzipped the files)
(and found tons of call numbers
and call history.)
(Messages didn't
sound like students.)
(The police will
investigate it again.)
No...
I didn't do anything wrong.
(Is the police finally
joining the match?)
(Where's the police
when you need them?)
(A sexual and financial extortion
against a vulnerable minor.)
(You'll get caught.
God will strike you!)
(Get the truth
about her unfair passing.)
(I bet she had an accomplice.)
(Get the accomplice, too!)
(Someone call the cops now.)
(Rot in a clink, dirty whore!)
Time for the finishing blow.
(Police Reinvestigating
the Eunseong High Suicide Case)
(The victim was blackmailed
by a female suspect.)
(A strong public
push for the police.)
(Hajun! I'm so anxious.
Text me!)
(Hurry up!)
(This is bad!)
(Where are you?)
(The poster called the cops!)
(This is serious.)
(Take a look at the forum.)
(What are you doing?)
(I'm so scared.)
(Call me as soon as you see this.)
(Please.)
It's an article
about her brother's arrest.
(Man in 20s Arrested Over.
(High School Girl
Exploitation Videos)
(...arrested for illegally
hacking intimate photos...)
The news of the arrest will
be a festival
for the online spectators.
Hayeon will be extremely agonized.
Will her brother's arrest
be enough to kill herself?
Some suicides
are a result of reason.
She could try to achieve a goal
by sacrificing herself.
Let's say a fire broke out.
You're with your sister.
You only have one air tank.
Will you use it?
Will you let your sister use it?
I'll make Hayeon believe
she's a threat to her brother.
I'll leverage their codependency.
"If I don't get caught,"
"my brother can stay innocent."
I'll lead her
to the absurd conclusion.
It's ridiculous but
I'll make Hayeon believe it.
Then...
I'll make her read this.
(The arrested man...)
(He's my colleague.)
(He has a sister.)
(...has to do with the dead girl.)
Hayeon will think
she's a threat to her brother.
She'll be shaken as much as
she loves and
cares for her brother.
Has anyone seen them together?
- How did you know?
- I came up with it.
For Hayeon to believe.
Even if she thinks
she'll send her brother to jail,
collecting personal data is
only a minor crime.
It's not bad enough
to waste her life.
Media will be all over
if it's a criminal case.
Then, citizens will put him
on trial again.
What Hayeon worries is
her brother being hunted down
online like Jieun was.
Seeing her brother
bashed for no reason,
won't she think
she ruined his life?
After that thought,
she'll think
it's easy for the police
to find the truth
about Jieun's case.
Then, confession isn't a choice.
She's been pressured by us
for a few days.
She'll choose
the fastest and easiest way,
her own death.
Watch Hayeon's last moment.
It's time to wrap up.
What?
I set up an induction speaker
at her home.
You'll hallucinate her again.
Pushing her to sacrifice for
her brother will easily end this.
Hey.
Get it done if you're serious.
I have a lot to do.
For true revenge for yourself.
"True revenge?"
Why do think
I'm dealing with Hayeon like this?
If she kills herself this way,
she won't leave a will.
I can wipe out the records
and reset her phone.
Her brother won't know
why his sister died
when she was fine a few days ago.
Won't he kick himself forever
for neglecting his sister
for work?
But no matter how agonized,
his sister won't come back.
Isn't this true revenge?
What...
What should I say?
What you've been saying is good,
or how about...
"Finish what
you couldn't last year?"
"What you couldn't last year?"
What happened last year?
- It was nothing.
- What is "nothing"?
What was it?
Hayeon...
Before Hayeon slit her wrist,
she left a goodbye to her brother.
But cutting your artery
isn't really easy.
Why did she attempt suicide?
Family, grades, and anxiety...
The list goes on.
But the trigger was
bullying at school.
Bullying?
Was Hayeon bullied?
Do you remember
what Eunho told us?
I mean...
they got kicked out for a kiss?
The older student was a girl, too.
Yunju kissed a girl.
Hayeon's mouth kicked her out.
This will help you understand.
(Hayeon's class president again?)
(Teachers should know
this is insane.)
(Her tattletale kicked Yunju out.
Damn loudmouth.)
(I heard her mouth sent someone
to the looney bin.)
Who posted these?
The one you know.
Someone I know?
It's a user agent record.
The poster uses
a Samsung Android phone.
The model is the Galaxy 22.
It can't be.
Jieun could never do this.
Someone with the same...
I've cross-checked
the IP and MAC address.
Hayeon probably can't,
but a hacker like Rat
can track this much.
(...sent someone
to the looney bin.)
No...
Jieun is not a mean girl.
Think however you want.
The truth will remain the same.
Should we
stop?
How pathetic.
You take revenge for your rage.
Don't use your sister
as your excuse.
Do it for yourself.
Stop this nonsense about
"letting your sister
rest in peace."
Don't run your mouth
like you know Jieun.
I'm her sister.
How agonized she was
and what she felt when she died,
I know best.
Who do you think you are,
telling me what to do?
I wonder if you can say that
after seeing this.
Why is this fake will
on Jieun's phone?
The will was fake,
but the message wasn't.
The message on the will.
I got it from Jieun's post.
This is...
Jieun's post?
Hello, stranger.
Everyone whom
I can talk to is gone.
Today, my sister told me
I have to testify at the court.
His lawyer will harass me
and humiliate me.
I felt disgusted.
I'll help you.
Just go and deny everything.
I don't want to say that.
I can feel my sister
forcing a smile.
Let's just give it...
No!
I don't want to
talk about it anymore!
I feel so useless.
I've always been
a burden to my family.
To my sister. To my mom.
Mom died because of me.
We're poor.
Mom had to work two jobs
for my sister and me.
Mom worked too hard and got ill.
That's why she died.
If I hadn't been born,
Mom wouldn't have died.
It's all my fault.
Bye, stranger.
I won't be in this world
by the time you read this.
I've been thinking about suicide
like a habit.
I'm so exhausted.
I had nightmares every night.
In my dream,
I walk down a barren desert
and get chased by a dark monster.
I relentlessly run and shout,
but no one helps me.
The dark monster rips
and crush me into pieces.
Its laugh is haunting.
But the most haunting part is that
I'm also laughing in my dream.
I have no place to run now.
Bye, stranger.
These might be
my last words to you.
It's so hard.
I don't want to pretend
nothing is wrong
in front of others.
Especially, in front of my sister.
I know she's acting.
It's better to end this once
and for all
rather than us living an act.
If I leave,
my sister can be happy.
No...
I can't...
How can I be happy without you?
My name is Yun Jieun.
I'm the girl
who caused a commotion online.
If you don't know me,
search me online
and you'll know quickly.
I didn't write
my name with a motive.
You don't know me.
I don't know you after all.
All I wish for is
a stranger to listen to my story
and to prove that I once existed.
Even if I don't exist
when you read this.
You knew everything
from the start.
This journal and everything.
Yes.
Why did you hide it until now?
- You didn't request it.
- But...
Why would I without a request?
If you wanted
the truth about Jieun,
your request would be different.
But you wanted revenge, not truth.
This might offend you.
You and I are similar people.
We thrive in solitude.
Instead of dull social activities,
we want to make
the best out of time.
We pass on gatherings to read.
But Jieun...
Jieun's not like you.
She feels peer pressure.
She wants to blend in with others.
She uses others as examples
to pretend to have common grounds.
She probably dated Eunho
for the same reason.
But without knowing
that could hurt Eunho more.
What do you mean?
Jieun dated Eunho
she didn't even like?
This is only an assumption.
I think Jieun liked someone else.
- Someone else?
- She deleted all the photos.
Except one photo of her friend.
Who do you think Jieun liked?
Did Jieun like Sumin?
I'm sure she was confused,
not being able to
understand her feeling.
When Jieun dated Eunho,
she probably did
because she knew
Sumin can't date her.
Finding out
she had hurt Sumin instead,
Jieun chose to walk away.
I thought I knew
everything there is about Jieun.
I gave up my life for Jieun.
I wanted to give Jieun
a comfortable life.
For your sister...
Do you think Jieun liked
how you sacrificed for her?
Her phone had one more photo
other than Sumin's.
We have no time.
It's time for revenge.
You told me the truth.
I thought you wanted me to stop.
Stop? Why would I?
I don't want to stop you.
I'm only a knife.
You decide how you want to use me.
Get a grip!
Don't die.
You can't die.
I should stop.
- PI Seol?
- Hop in.
Seatbelt.
Hayeon gave
girls' information to Rat.
Rat used it to blackmail
and take advantage of them.
I don't think Hayeon knew
her brother's vile crime.
She probably thought
it was his kink.
He'll get
at least 30 years in jail.
Will Hayeon be okay?
She's probably shocked
by her confidant's betrayal.
But she'll be fine.
She's tougher than we think.
Now, let's talk about
the 200K revenge fee.
Feel free to share your plan.
How about 20K per year
for 10 years?
Not happy.
How about 5K per quarter?
Not happy with that, either.
What do you want then?
You said you can
customize the plan.
How about being my assistant?
Your assistant?
Like Holmes and Watson.
I think you'll do pretty well.
How much do I get paid?
I'll deduct 10K per month.
Then, let's make it 15K.
I need food on my table.
Also, guarantee
a five-year contract.
15K per month for 5 years?
You're robbing me blind.
It's up to you.
I'll look for another job.
Okay.
Okay, deal.
Also...
- What is it?
- I hate being late.
Move under my office.
Move just like that?
Without the landlord's approval?
- It's my building.
- What?
I have many empty units.
Pick whichever.
I heard you're
a detective fiction fanatic.
Is there a special reason
for loving detective fictions?
As a boy, instead of textbooks,
I read the books of Agatha
Christie and Conan Doyle.
Actually,
my dream was to become
a great detective like
Sherlock Holmes or Hercule Poirot.
Somehow, I'm a businessman.
Of course, I still dream
of being a detective.
It has a special place
in my heart.
Is there a book
you'd like to recommend to me?
The Sherlock Holmes collection?