Mouse (마우스)

At times, I go on random hunting trips.

This old lady saw something she shouldn't have...

and ended up as an unexpected target.

Until it takes its last breath,

a prey should fight for dear life.

However, this certain prey lacks the energy to do so.

Which is what makes this hunt too easy...

and boring.

Why couldn't I...

have been born this way?

All good.

I...

wish to be like him.

I wish to be him.

We're...

lab mice.

Lab mice.

We are...

lab mice.

If it wasn't Sung Yo Han,

who killed my grandmother?

I left behind the photo of Jennifer.

Jung Ba Reum went to find it,

but what if they get to it first?

No, we'll wait a while longer.

Just a second.

Darn it.

What about the photo? Did you find it?

Why? Is it a photo...

that shouldn't be seen by certain people?

What?

This one day, I received a text from an anonymous sender.

A text? - My mom,

Jae Min, and my stepfather.

After I made the decision to avenge my family,

I searched for him day and night.

Is he not an ex-con?

He looked like someone who knew how to punch.

We're closed.

I immediately recognized him.

That's the day when...

the suppressed killer within me let loose.

Following my brain implant surgery,

that side of me laid dormant thanks to Sung Yo Han,

but an incident pushed it back out.

The killings that mimicked my previous ones.

Woo Hyung Chul wasn't a copycat.

After he committed the murders,

someone left a fake brooch, a necklace,

and even the scent of mint...

that I testified to smelling at the scene.

I ended up killing Woo Hyung Chul...

and the killer within me awoke once more.

Who could it have been?

Why was Song Soo Ho's location texted to me?

Why on earth?

Why were the scenes of Woo Hyung Chul's crimes staged?

I don't know.

To trigger me.

To awake the killer within me.

I was given a prey to hunt.

What could be their goal in doing such a thing?

They were aware from the start that I was born...

with the psychopathic gene.

I remembered what Sung Yo Han said to me before dying.

According to him, we were lab mice.

You have to be involved for them to know...

that we both had the gene.

I... I have no idea what you're talking about.

You don't?

Then why is my diary...

and Sung Yo Han's burner phone he used to contact you...

over there in your belongings?

Explain to me in a way that I'd understand.

You knew from the start that I was the Predator.

Yes, I knew.

When I first heard of the serial murders in Korea...

possibly committed by a psychopath,

I thought the killer could be 1 of the 2 boys.

Agitated, I came straight to Korea.

Back then,

I thought you had murdered your family.

That's why I was sure you were the Predator.

I went to see the other boy just in case though.

You should take better care of yourself, you know.

In his eyes, I saw obvious jealousy.

The kind you never see in a true predator.

That's when I knew...

Sung Yo Han was innocent.

I tried to stop you from killing.

You were going off the rails.

After much consideration, I contacted Sung Yo Han.

Dr. Lee!

No... No hospitals.

They're... They're going to brutally kill me.

Who... Who?

First, you need to get rid of him.

Who... Who is he?

Why did he do this to you?

You... You need...

You need to listen to me carefully, Yo Han.

That day, I told him everything.

That's why he helped me.

I got treated...

in his basement.

Then he took me to the abandoned hospital.

You lied to me and used me.

I'm sorry.

I... I tried to stop them.

Why aren't you stopping him?

We agreed to go public once he showed his murder instincts.

We agreed to reintroduce the agenda.

Why aren't you keeping your promise?

So many people have died already!

How could you just watch them die?

You're crazy. You need to stop this now.

He's out of control right now.

Do you think I'll just sit back and do nothing?

Who's behind this?

Tell me who it is! Tell me!

Who is it? Who's the jerk?

Ms. Choi, what brings you here?

I had a favor to ask,

but I thought you might refuse if I asked you over the phone.

I have a guest over, so can we talk next time?

It won't take long.

Can you do an interview, Officer Jung?

What interview?

The Moojin serial murder case?

Yes. You're the only survivor.

So I really want you to do an interview...

about what happened that day.

I'll soon tell you everything.

But not now.

What?

Hello? - Officer Jung.

What took you so long to answer your phone?

Thank goodness he was on the phone.

You can come to my place.

I'll look into where you can stay.

I need to find Jennifer's photo.

I'll go get it soon.

I need it now.

If those guys get their hands on that photo,

they'll find out I'm still alive.

Okay, I'll drop by right now. - And...

there's something you need to know.

What's that?

Don't worry. The police will protect you.

The police?

Yu Na...

stopped talking the moment I mentioned "police".

The receiver cannot be reached... - Why isn't Detective Ko...

answering his phone?

Detective Ko, I heard you tracked down the car.

You punk.

Detective Ko, what are you doing?

You're a psychopath, aren't you?

Detective Ko. - Let go of me! Get off!

Ba Reum! Detective Ko!

Why are you doing this? - Move!

You killed everyone...

Follow me.

Detective Ko!

Detective Ko, stop it! - Bong Yi.

My gosh.

Bong Yi! Bong Yi! - Bong Yi, stop.

Let go of him.

What's the matter? - Detective Ko, what's going on?

What do you think you're doing? - Get off me!

Get off me! Let me go!

You should go.

No, wait!

Ba Reum! Detective Ko! - You.

Hey! - You punk.

You killed everyone, didn't you?

Kang Duk Soo, Lee Jae Shik, and Kim Byung Tae.

Why aren't you denying it?

Did you really kill them?

Hey, what are you talking about? - He killed them all.

I have proof.

Where's Detective Lee?

Where's Lee Min Soo?

Min Soo!

Hey, you're in there, aren't you?

Get out of there!

Come outside now!

Gosh, what do you want this time? - You punk!

Where is it? Where is it? - Where's what?

Sir, calm down. Sir!

How did he find out?

What kind of evidence does he have?

Now isn't the right time

I need to buy time until I find out who killed Chi Kook.

I need to deny it for now.

Just a second.

Stop it. - Get off me.

Gosh, stop it.

Get off.

Sir! - Move, you punk!