Mouse (마우스)

Scalpel.

Don't think you've been wronged.

You, at least,

get to live on like this.

Hey, Bong Yi.

I just sent you a photo.

Can you check if he's the doctor?

Ba Reum, it's him. He's the guy who did your surgery.

How did Han Seo Joon get to operate on my brain?

And why?

"F25, 17SEX."

What's this?

"F" means female, "M" means male.

The numbers after the letter are...

the age of the victims.

Could the rest indicate the order in which they died?

The order of death.

Kim Hyun Sik was abducted before Joo Mi Hye though.

"Sex"?

What could that mean?

A punctured little finger.

A dot?

It's between S and E, X.

Could it be an abbreviation?

"Serial numbering for animal testing."

"A system to identify tested animals."

"Mice that have been tested on..."

"are left with marks that involve the puncture of ears."

Ear tags or ear punches.

Experiments.

Test subjects.

"Subject of experiment"?

"S" as in subject and "EX" as in experiment.

They were test subjects.

Song Soo Jung, female, 25 years old,

and the 17th test subject.

They're test subjects.

Was the finger punctured instead of the ear then?

To people?

What did he experiment on humans?

It's impossible for brain damage...

to make you more sensitive to smell.

Although, there is one way that could happen.

If the olfactory bulb in the frontal lobe is replaced.

A frontal lobe...

can be replaced? - What on earth...

did he do to the mouse's head?

If you let it live, you'll end up like that rat snake.

Is that what you want?

A nasty brain has been placed in this mouse.

"A nasty brain"?

You seem different. Compared to before, I mean.

Did you spend some time in a psychopath's brain?

What is this feeling?

That's why I've been remembering...

Sung Yo Han's memories.

Don't tell me...

you implanted Sung Yo Han's brain inside me.

Is that what you did?

You figured it out faster than expected...

which reduces the fun.

"Head Hunter."

About that nickname people gave me.

I actually quite like it.

So you took their heads after killing them to...

I even cut open the heads when they were still alive.

Everything was perfect.

Both the killings and my experiments.

I was on the verge of a major breakthrough...

until that young boy...

Die!

Wait. What's going on?

He was arrested for the murder of Woo Jae Pil.

The murder of Woo Jae Pil?

Hey. How could you end up doing this?

You moron. Why?

You just threw your life away! - Calm down.

Moo Chi! - Detective...

Hey!

Detective Kang!

Moo Chi...

My life came to this because of that boy.

Don't look at me like that.

I only took...

a few human heads to benefit mankind.

Every achievement requires minor sacrifices.

Don't you agree? - "Minor sacrifices"?

That's what human life means to you?

Thanks to them,

you were able to survive your injury.

No, it's a lie!

What's going on? Detective Ko killed Woo Jae Pil?

We should talk outside.

He killed Woo Jae Pil to get to Han Seo Joon?

To be incarcerated in the same prison?

The possibility always worried me, but he eventually crossed the line.

That's why...

he kept pushing you away.

He was going to kill Han Seo Joon and become a murderer himself,

so he knew he couldn't...

Actually, he was determined to keep you out of it.

He made the decision...

on the day he was actually going to ask you out.

Your eyes will be bleeding at this rate.

Don't work yourself too hard.

Hey, your nose is bleeding.

You're like a student studying for his exam.

It's been three nights already.

I'll keep watch, so get some shut-eye.

Those sisters were raped and killed with a hammer.

Can you sleep when you think about their parents?

I will catch that louse and lock him up.

Hey. What is this?

What's your problem? Don't go through my things.

You plan to ask Ms. Choi out, don't you?

No. - Whatever.

Anyone can see it in your eyes when you look at her.

Darn it. Is it obvious?

Very, very much.

When do you plan to do it?

Tomorrow. She's buying me dinner for helping her...

with her research.

I figure this is my chance.

But what if she says no?

To be honest, I'm crazy nervous.

Feel my heart.

Even murderers don't scare the mighty Moo Chi.

Wow. Love is powerful, isn't it?

Isn't her program on today?

No. We're on a stakeout.

Then you don't have to watch it.

I have...

found peace in my heart.

I don't have nightmares anymore.

After confessing to the Lord and receiving forgiveness,

I feel completely at peace.

I sleep well now too. - Hey.

Come... Come to think of it,

this will be recorded by the dash cam.

We'll be disciplined for slacking off.

Right. It's the anniversary of his mother's passing,

so he'll come.

He may be in the area,

so I'll make a lap.

Now,

I pray every day so that the families of my victims...

can find peace... - "Peace"?

from the pain I've caused.

You sleep well now?

Although...

I'm still living in endless torment...

He was a world-renown murderer. - and have nightmares every night.

The Head Hunter... - You low life.

After confessing and asking for forgiveness,

he has found peace... - Why are you still alive?

Why won't they execute you? - How will the victim's families...

be feeling about it? - Darn it.

Did the victims' families find peace as well?

We requested interviews from the victims' families, but...

If the nation won't do it, I will.

We met Father Ko Moo Won, - I'll kill you myself.

and discovered...

I'll kill you. - something unexpected.

Father Ko Moo Won, who studied theology at a later age...

submitted a petition requesting Han Seo Joon not be executed.

Forgiveness saved his life.

I'll let you go.

Go.

What?

Run away.

Run away.

Don't do it. Don't kill him.

Are you insane? - Let go.

Snap out of it. Get it together!

If you get in my way again, I'll kill you first.

You should've fired him.

Why did you take him to the Evidence Managing Team?

Why did you take him to a division that gets issued firearms?

You took him on purpose, right?

You knew he'd be like that,

and you used the poor kid, didn't you?

You wanted him to take revenge...

for your daughter, didn't you?

You freak. Stop it.

Don't take it out on him.

Darn it.

I'm sorry. He never drinks...

But he's upset about Moo Chi...

That poor kid.

Hello? I think he is in shock.

Well, it's CP. And the location of the hemorrhage must've been tricky.

But you did great work.

And the patient's current condition is good as well.

I understand she's a patient of Dr. Gary's?

Precisely. And 15 years ago, when she was 5 years old,

she was diagnosed with CP by Dr. Gary.

Well, you're in good hands now. We'll take very good care of you.