The Case Book of Arne (2026) s01e04 Episode Script
Those Who Never Gamble Never Win
1
Let's run away, Diana.
The only person who stood
in our way is dead.
So much drama.
Here, there, and everywhere.
THE CASEBOOK OF ARNE
Would you mind telling me what
you were doing when my father was killed?
PART 4: THOSE WHO NEVER GAMBLE NEVER WIN
It happened between
about 12 and 12:30.
Great. Now even
the mistress suspects us.
No, I simply want to prove
none of you are the killer.
I suppose I can start.
I was discussing meal plans with Heinz.
After that, I went to my room to read.
I was busy with meal prep.
Before that, I think Elise came to see me.
Y-Yes'm!
E-Every day at noon, I'd bring water to the
master so he could, um, take his medicine.
A-After that, um, I just
stayed in my, uh, room.
Up until the time I went to see the master,
I was standing ready in the dining room.
The only people I saw were Elise,
who was passing by, and Gordon, I think.
Yes.
Oh, that reminds me.
I think it was just after Elise left,
but I thought I saw someone
in the backyard.
The dogs didn't start barking, though,
so maybe I imagined it.
The backyard again?
Thank you very much.
I'll go ask Diana, too.
2ND FLOOR EAST CORRIDOR
Once I get everyone's statements,
I'll report back to Lord Arne.
It's just an object.
Hurry up! Before the police arrive!
Mistress!
Where is Kai right now?
When my father was killed, a shadowy figure
was seen in the backyard.
I know Kai can get into the mansion
through the second floor,
like he did just now.
I don't
Where were you, Diana?
I-I was in the maids' room the whole time.
But Elise says she was in there alone.
Were you and Kai in here at that time?
Why did Mistress Lynn show up?
Elope?
Kai and I made a promise we would.
However, when we heard Bernd scream,
I made my way to the master's room.
I swear we stayed here until then.
Neither Kai nor I left the room.
But why didn't you just run away?
You could've ignored the scream.
Th-That's because
I-I was too scared to climb down
the ladder into the yard.
Come again?
He told me I wouldn't be so scared
if I climbed down blindfolded.
Even though you're afraid
of heights, Diana?
I know it's dumb.
So you really are together, Diana?
I'm the type to fall deeper in love
the more obstacles there are in the way.
"Ah, my beloved is here to rescue me
from this difficult life."
"If we cannot be wed,
we will soon meet in heaven."
Wow, you really are in love
with each other.
So isn't it great the master's dead?
Huh?
He must be at peace now that
he's with his beloved wife again.
Diana?
Huh?
Kai! Kai!
Lord Arne?
You needed to see this guy, right?
I went and grabbed him for you.
Huh?
If you wanna get 'em talking,
we oughta put the screws
on all the humans here.
Wait. Were you the one
who hurt Gordon and the others?
Yeah, I thought it'd liven the show up
a bit. You should be thanking me.
You're puttin' up more of a fight than
I expected, ya pathetic, mangy puppet.
Puppet?
I am
Neuntöte, the nine kings
combined as one body.
So this vessel of mine really thinks
it has a mind of its own now?
Then, where does my mind,
my personality, my free will come from?
Fool. You are me.
There is one heart
remaining in this body.
If by some chance its blood
took control of me
And I am you, fool.
But who am I?
What do you think you're doing?!
What am I doing?
Yes, what am I doing,
wasting time on this lowlife?
Huh?
I do wonder about who I really am,
but one thing is for certain.
I am not you, Nachzehrer.
Fine. I'll see you again soon enough.
Enjoy playing your little
detective games while you can.
As head of the Reinweiß estate,
I cannot allow you to harm
members of my house.
What is going on here?
How can you say that?
Oh, that's right.
I think I threw the gardener in here.
Stand aside, mistress.
What is this thing?
Is this who killed the master?
No, it's not!
But for now, could you please
not tell anyone else about him?
Huh?
I'm counting on you.
Please get out.
I do not want to see you right now.
Fine.
Sorry about this.
You got into a fight with Arne?
I don't know what to believe anymore.
Then, don't believe anything.
Huh?
Isn't it more about using or being used?
I mean, I only hang out with Arne
because it can be fun sometimes.
When you say "using"
Does that mean you're also using me?
Mm-hmm. But we're at least
using you as a human being.
As a human being?
Maybe you've already noticed,
but you're basically this
household's dress-up doll.
I always thought I had to act like
a proper mistress and a worthy successor.
But you're right. It was like a dress
everyone else forced me to wear.
The tracksuit is probably the only outfit
I had that let me express myself.
Say, here's an idea. Why don't you see
if you can solve this case by yourself?
Huh?
Do it your way for once.
And if it helps bring a smile to your face,
I'll let you use me to help.
I find that hard to believe.
Aw, don't say that.
You'll really help me, then?
Of course. And I'll start with some info.
You know the short maid?
I don't think she returned
to her room before the murder.
Wh-What am I going to do?
If anyone, uh, finds this—
What do you have in there?
Let me see it.
N-N-No, I cannot!
My underwear's far too racy
for you to see, mistress!
I know you wear stuff
with teddy bear prints!
Huh?
I was taking a glass of water
to the master's room that day,
when I remembered
he'd told me he didn't want any.
I was so, so tired and didn't want
to go back to the kitchen,
so I tried to pour the water
into the vase right here.
2ND FLOOR WEST STAIRCASE
And you broke the glass and the vase?
That explains the noise.
But where did this vase come from?
I found it in the, uh, storeroom
and brought it here, yes'm.
The storeroom?
And that's when I heard Bernd.
But please! Don't tell
Mister Gordon about this!
I-If he ever finds out, I-I-I will be
So the broken vase was
your doing after all, Elise?
Why don't you come with me
and tell me all about it?
I am so sorry!
I feel kind of bad for Elise.
Huh?
"I am waiting in the backyard."
Lord Arne?
"Sorry about this."
I don't understand Lord Arne at all.
Oh. Why don't we play tomorrow, boys?
What's wrong? It's only me.
S-Somebody
Lord Arne!
You called?
Huh?
Huh?
Get lost.
But I thought you'd left.
You didn't want to see me,
so I just went somewhere you couldn't.
Willing to hear me out now?
Nachzehrer?
The belligerent "lord of the shadows"
with a voracious appetite,
who was one of the nine vampire kings?
The idea that you were fighting him
for control of your own body is
the most incredible thing I've ever heard!
Did you really think I'd believe you?
Believe what you want, but he was right.
I'm nothing but a mangy puppet.
A puppet?
I don't even know where
my consciousness comes from.
It's laughable.
I would never laugh at you.
You are still you, Lord Arne.
Am I?
Are you also using me, Lord Arne?
Yeah. It makes the investigation more fun.
I see.
Anyway, I think I understand the situation.
And I apologize for slapping you.
It was no worse than a gentle pat.
Now I'll tell you what I've found out.
So that's everyone's whereabouts
when Father was murdered.
The servants' statements don't seem
to contradict Zisye's observations.
Where are the mirrors in the mansion?
Let's see here. On the first floor,
in Lynn's room and the maids' room.
LYNN'S ROOM
MAIDS' ROOM
On the second, in the waiting room
and the guest rooms.
WAITING ROOM | GUEST ROOM X4
CORRIDOR
Also in the west corridor.
Based on this information,
none of the servants
could have been the killer!
Zisye, did you notice anything else?
Anything else? Nope.
Do the guard dogs attack everyone,
including their masters?
No, they're actually
very comfortable with me.
I don't know why they chased me earlier.
It has to be the smell.
The smell?
I detect the faint odor
of blood on you.
So that's why they
Wait a minute. Do I smell right now?
Yup, you smell. You can't
fool a vampire's nose.
I'm going to take a bath!
Huh?
I haven't had a bath in two days!
I can't focus on
the investigation in this state!
Hey, there's still something I—
"You smell"? He really said that.
I can't believe the vampire I always
looked up to would be so indelicate.
But if Lord Arne hadn't
been there for me
Oh, great. You ended up as
the next victim, Lynn Reinweiß.
Huh? I did try to warn you.
You're the one who ran off.
Did you see your attacker?
It was from behind
What are you laughing about?
My mother said she wanted to die smiling.
Did she think death was funny?
No. She wanted to live longer.
And so do I.
Well, you'll be joining her soon.
My blood
What's that?
I ask you to please drink my blood.
You're still asking for that
at a time like this?
When a vampire drinks your blood,
you gain astonishing recuperative powers,
but in exchange, you lose your free will
and become the vampire's puppet.
Are you willing to do that to stay alive?
I haven't finished anything yet.
But with those wounds,
you won't even survive as a puppet.
Or is it this Neuntöte blood you want?
I'd rather have you.
Huh?
I want your blood, Lord Arne.
What are you saying?
Hey, don't die on me yet.
Oh, fine.
You might as well live a little longer.
By the time I came to, it was all over.
Looks like you can move again,
but in a few minutes, you'll become
a puppet and face death anyway.
Before then, answer me this:
What did you mean by my blood?
The blood running through this body
is from the one heart that remains.
It is not mine.
But my blood is in there too now.
When vampires drink other people's blood,
it combines with their own.
If you dissolve salt in fresh water,
it can never be fresh water again.
This is the same. Your blood belongs
to you and nobody else, Lord Arne.
So please don't call yourself a puppet.
You are much more than that.
This coming from someone
who's about to become a puppet herself?
Lord Arne, I would like to use you
to help me solve this mystery.
"Use" me?
You? A mere human?
You are a fool through and through.
Allowing you to use me would not be—
Interesting to you?
But what if I made it so?
Huh?
I couldn't get over the way you two said
you use people for amusement.
But if it means I can finally take
center stage in this investigation,
I would gladly dance in the palm
of your hand for your entertainment.
But only if the stage you set
is truly worthy of me.
Are you saying it hasn't been so far?
Of course it hasn't!
How is it worth my efforts if I'm simply
being dangled like a marionette?
The star of my show should be me.
As your client, I hereby withdraw
my request and terminate our contract.
Now, please return the blood
I gave you as a deposit.
Return your blood?
You will return my blood, won't you?
You're asking me to give you my blood.
You do understand what that means, right?
When a human like you
exchanges blood with a vampire,
you complete a blood oath
that turns you into a vampire as well.
There's no guarantee it'll even work.
In order to use you, Lord Arne,
and to be used by you,
I cannot die.
You are the most devil-may-care human
I have ever met, Lynn Reinweiß.
Do you have any last words as a human?
No matter what happens,
I will always be who I am.
Then, let us begin.
I swear on the name of Arne Neuntöte
that I hereby join in camaraderie
with this fool known as
Lynn, my darling,
everything will be fine.
TRANSLATION: MICHAEL ARNOLD
TIMING: HENRY LIN
EDITING: SMR
What are you crying for?
I don't know.
QUALITY CONTROL: ELISABETH CRIS
TRANSLATION CHECK: ELIZABETH ELLIS
But I think I just saw my mother.
What's that supposed to mean?
Hey, Lynn.
Zisye.
Oh, good. I was worried about you.
Did you see who attacked me?
If I had, I would've told Arne already.
How did someone get in?
And why come after me?
Because you were alone
and an easy target?
But I was spared when I was
attacked in Father's room.
Why not just kill me then?
We non-humans probably
wouldn't give it a second thought.
Oh?
You'll understand soon enough, Lynn.
You're a vampire now.
Oh no!
Will my vampiric instincts make me
attack people indiscriminately?
Well, no. It just means you won't worry
too much about attacking humans.
We can chat later.
Call for the servants to assemble.
I suppose I should say,
"Pleased to make your acquaintances."
My name is Arne.
It seems like this case grew a little
too big for Detective Lynn Reinweiß,
my very own apprentice,
so I, a great detective myself,
have decided to make an appearance.
Mistress, why are you still with him?
And "apprentice"? "Famous detective"?
She's the pioneering, beautiful
woman detective we talked about.
Does this mean you know
who killed the master?
It means exactly that.
But there are two detectives
on the scene here.
Simply exposing the killer
is a little anticlimactic.
Thus, I hereby deduce
that this maid is the culprit.
Huh?
What?
I want you to use all of
your reasoning skills to refute me.
We both have the same information.
Let's make a grand show
of this final reveal.
Lord Arne really is setting the stage
for me to play the lead.
Let's find out if this play is worthy
of me or not, Lord Arne.
Then, let us begin the final act.
Let's run away, Diana.
The only person who stood
in our way is dead.
So much drama.
Here, there, and everywhere.
THE CASEBOOK OF ARNE
Would you mind telling me what
you were doing when my father was killed?
PART 4: THOSE WHO NEVER GAMBLE NEVER WIN
It happened between
about 12 and 12:30.
Great. Now even
the mistress suspects us.
No, I simply want to prove
none of you are the killer.
I suppose I can start.
I was discussing meal plans with Heinz.
After that, I went to my room to read.
I was busy with meal prep.
Before that, I think Elise came to see me.
Y-Yes'm!
E-Every day at noon, I'd bring water to the
master so he could, um, take his medicine.
A-After that, um, I just
stayed in my, uh, room.
Up until the time I went to see the master,
I was standing ready in the dining room.
The only people I saw were Elise,
who was passing by, and Gordon, I think.
Yes.
Oh, that reminds me.
I think it was just after Elise left,
but I thought I saw someone
in the backyard.
The dogs didn't start barking, though,
so maybe I imagined it.
The backyard again?
Thank you very much.
I'll go ask Diana, too.
2ND FLOOR EAST CORRIDOR
Once I get everyone's statements,
I'll report back to Lord Arne.
It's just an object.
Hurry up! Before the police arrive!
Mistress!
Where is Kai right now?
When my father was killed, a shadowy figure
was seen in the backyard.
I know Kai can get into the mansion
through the second floor,
like he did just now.
I don't
Where were you, Diana?
I-I was in the maids' room the whole time.
But Elise says she was in there alone.
Were you and Kai in here at that time?
Why did Mistress Lynn show up?
Elope?
Kai and I made a promise we would.
However, when we heard Bernd scream,
I made my way to the master's room.
I swear we stayed here until then.
Neither Kai nor I left the room.
But why didn't you just run away?
You could've ignored the scream.
Th-That's because
I-I was too scared to climb down
the ladder into the yard.
Come again?
He told me I wouldn't be so scared
if I climbed down blindfolded.
Even though you're afraid
of heights, Diana?
I know it's dumb.
So you really are together, Diana?
I'm the type to fall deeper in love
the more obstacles there are in the way.
"Ah, my beloved is here to rescue me
from this difficult life."
"If we cannot be wed,
we will soon meet in heaven."
Wow, you really are in love
with each other.
So isn't it great the master's dead?
Huh?
He must be at peace now that
he's with his beloved wife again.
Diana?
Huh?
Kai! Kai!
Lord Arne?
You needed to see this guy, right?
I went and grabbed him for you.
Huh?
If you wanna get 'em talking,
we oughta put the screws
on all the humans here.
Wait. Were you the one
who hurt Gordon and the others?
Yeah, I thought it'd liven the show up
a bit. You should be thanking me.
You're puttin' up more of a fight than
I expected, ya pathetic, mangy puppet.
Puppet?
I am
Neuntöte, the nine kings
combined as one body.
So this vessel of mine really thinks
it has a mind of its own now?
Then, where does my mind,
my personality, my free will come from?
Fool. You are me.
There is one heart
remaining in this body.
If by some chance its blood
took control of me
And I am you, fool.
But who am I?
What do you think you're doing?!
What am I doing?
Yes, what am I doing,
wasting time on this lowlife?
Huh?
I do wonder about who I really am,
but one thing is for certain.
I am not you, Nachzehrer.
Fine. I'll see you again soon enough.
Enjoy playing your little
detective games while you can.
As head of the Reinweiß estate,
I cannot allow you to harm
members of my house.
What is going on here?
How can you say that?
Oh, that's right.
I think I threw the gardener in here.
Stand aside, mistress.
What is this thing?
Is this who killed the master?
No, it's not!
But for now, could you please
not tell anyone else about him?
Huh?
I'm counting on you.
Please get out.
I do not want to see you right now.
Fine.
Sorry about this.
You got into a fight with Arne?
I don't know what to believe anymore.
Then, don't believe anything.
Huh?
Isn't it more about using or being used?
I mean, I only hang out with Arne
because it can be fun sometimes.
When you say "using"
Does that mean you're also using me?
Mm-hmm. But we're at least
using you as a human being.
As a human being?
Maybe you've already noticed,
but you're basically this
household's dress-up doll.
I always thought I had to act like
a proper mistress and a worthy successor.
But you're right. It was like a dress
everyone else forced me to wear.
The tracksuit is probably the only outfit
I had that let me express myself.
Say, here's an idea. Why don't you see
if you can solve this case by yourself?
Huh?
Do it your way for once.
And if it helps bring a smile to your face,
I'll let you use me to help.
I find that hard to believe.
Aw, don't say that.
You'll really help me, then?
Of course. And I'll start with some info.
You know the short maid?
I don't think she returned
to her room before the murder.
Wh-What am I going to do?
If anyone, uh, finds this—
What do you have in there?
Let me see it.
N-N-No, I cannot!
My underwear's far too racy
for you to see, mistress!
I know you wear stuff
with teddy bear prints!
Huh?
I was taking a glass of water
to the master's room that day,
when I remembered
he'd told me he didn't want any.
I was so, so tired and didn't want
to go back to the kitchen,
so I tried to pour the water
into the vase right here.
2ND FLOOR WEST STAIRCASE
And you broke the glass and the vase?
That explains the noise.
But where did this vase come from?
I found it in the, uh, storeroom
and brought it here, yes'm.
The storeroom?
And that's when I heard Bernd.
But please! Don't tell
Mister Gordon about this!
I-If he ever finds out, I-I-I will be
So the broken vase was
your doing after all, Elise?
Why don't you come with me
and tell me all about it?
I am so sorry!
I feel kind of bad for Elise.
Huh?
"I am waiting in the backyard."
Lord Arne?
"Sorry about this."
I don't understand Lord Arne at all.
Oh. Why don't we play tomorrow, boys?
What's wrong? It's only me.
S-Somebody
Lord Arne!
You called?
Huh?
Huh?
Get lost.
But I thought you'd left.
You didn't want to see me,
so I just went somewhere you couldn't.
Willing to hear me out now?
Nachzehrer?
The belligerent "lord of the shadows"
with a voracious appetite,
who was one of the nine vampire kings?
The idea that you were fighting him
for control of your own body is
the most incredible thing I've ever heard!
Did you really think I'd believe you?
Believe what you want, but he was right.
I'm nothing but a mangy puppet.
A puppet?
I don't even know where
my consciousness comes from.
It's laughable.
I would never laugh at you.
You are still you, Lord Arne.
Am I?
Are you also using me, Lord Arne?
Yeah. It makes the investigation more fun.
I see.
Anyway, I think I understand the situation.
And I apologize for slapping you.
It was no worse than a gentle pat.
Now I'll tell you what I've found out.
So that's everyone's whereabouts
when Father was murdered.
The servants' statements don't seem
to contradict Zisye's observations.
Where are the mirrors in the mansion?
Let's see here. On the first floor,
in Lynn's room and the maids' room.
LYNN'S ROOM
MAIDS' ROOM
On the second, in the waiting room
and the guest rooms.
WAITING ROOM | GUEST ROOM X4
CORRIDOR
Also in the west corridor.
Based on this information,
none of the servants
could have been the killer!
Zisye, did you notice anything else?
Anything else? Nope.
Do the guard dogs attack everyone,
including their masters?
No, they're actually
very comfortable with me.
I don't know why they chased me earlier.
It has to be the smell.
The smell?
I detect the faint odor
of blood on you.
So that's why they
Wait a minute. Do I smell right now?
Yup, you smell. You can't
fool a vampire's nose.
I'm going to take a bath!
Huh?
I haven't had a bath in two days!
I can't focus on
the investigation in this state!
Hey, there's still something I—
"You smell"? He really said that.
I can't believe the vampire I always
looked up to would be so indelicate.
But if Lord Arne hadn't
been there for me
Oh, great. You ended up as
the next victim, Lynn Reinweiß.
Huh? I did try to warn you.
You're the one who ran off.
Did you see your attacker?
It was from behind
What are you laughing about?
My mother said she wanted to die smiling.
Did she think death was funny?
No. She wanted to live longer.
And so do I.
Well, you'll be joining her soon.
My blood
What's that?
I ask you to please drink my blood.
You're still asking for that
at a time like this?
When a vampire drinks your blood,
you gain astonishing recuperative powers,
but in exchange, you lose your free will
and become the vampire's puppet.
Are you willing to do that to stay alive?
I haven't finished anything yet.
But with those wounds,
you won't even survive as a puppet.
Or is it this Neuntöte blood you want?
I'd rather have you.
Huh?
I want your blood, Lord Arne.
What are you saying?
Hey, don't die on me yet.
Oh, fine.
You might as well live a little longer.
By the time I came to, it was all over.
Looks like you can move again,
but in a few minutes, you'll become
a puppet and face death anyway.
Before then, answer me this:
What did you mean by my blood?
The blood running through this body
is from the one heart that remains.
It is not mine.
But my blood is in there too now.
When vampires drink other people's blood,
it combines with their own.
If you dissolve salt in fresh water,
it can never be fresh water again.
This is the same. Your blood belongs
to you and nobody else, Lord Arne.
So please don't call yourself a puppet.
You are much more than that.
This coming from someone
who's about to become a puppet herself?
Lord Arne, I would like to use you
to help me solve this mystery.
"Use" me?
You? A mere human?
You are a fool through and through.
Allowing you to use me would not be—
Interesting to you?
But what if I made it so?
Huh?
I couldn't get over the way you two said
you use people for amusement.
But if it means I can finally take
center stage in this investigation,
I would gladly dance in the palm
of your hand for your entertainment.
But only if the stage you set
is truly worthy of me.
Are you saying it hasn't been so far?
Of course it hasn't!
How is it worth my efforts if I'm simply
being dangled like a marionette?
The star of my show should be me.
As your client, I hereby withdraw
my request and terminate our contract.
Now, please return the blood
I gave you as a deposit.
Return your blood?
You will return my blood, won't you?
You're asking me to give you my blood.
You do understand what that means, right?
When a human like you
exchanges blood with a vampire,
you complete a blood oath
that turns you into a vampire as well.
There's no guarantee it'll even work.
In order to use you, Lord Arne,
and to be used by you,
I cannot die.
You are the most devil-may-care human
I have ever met, Lynn Reinweiß.
Do you have any last words as a human?
No matter what happens,
I will always be who I am.
Then, let us begin.
I swear on the name of Arne Neuntöte
that I hereby join in camaraderie
with this fool known as
Lynn, my darling,
everything will be fine.
TRANSLATION: MICHAEL ARNOLD
TIMING: HENRY LIN
EDITING: SMR
What are you crying for?
I don't know.
QUALITY CONTROL: ELISABETH CRIS
TRANSLATION CHECK: ELIZABETH ELLIS
But I think I just saw my mother.
What's that supposed to mean?
Hey, Lynn.
Zisye.
Oh, good. I was worried about you.
Did you see who attacked me?
If I had, I would've told Arne already.
How did someone get in?
And why come after me?
Because you were alone
and an easy target?
But I was spared when I was
attacked in Father's room.
Why not just kill me then?
We non-humans probably
wouldn't give it a second thought.
Oh?
You'll understand soon enough, Lynn.
You're a vampire now.
Oh no!
Will my vampiric instincts make me
attack people indiscriminately?
Well, no. It just means you won't worry
too much about attacking humans.
We can chat later.
Call for the servants to assemble.
I suppose I should say,
"Pleased to make your acquaintances."
My name is Arne.
It seems like this case grew a little
too big for Detective Lynn Reinweiß,
my very own apprentice,
so I, a great detective myself,
have decided to make an appearance.
Mistress, why are you still with him?
And "apprentice"? "Famous detective"?
She's the pioneering, beautiful
woman detective we talked about.
Does this mean you know
who killed the master?
It means exactly that.
But there are two detectives
on the scene here.
Simply exposing the killer
is a little anticlimactic.
Thus, I hereby deduce
that this maid is the culprit.
Huh?
What?
I want you to use all of
your reasoning skills to refute me.
We both have the same information.
Let's make a grand show
of this final reveal.
Lord Arne really is setting the stage
for me to play the lead.
Let's find out if this play is worthy
of me or not, Lord Arne.
Then, let us begin the final act.