Undercover High School (언더커버 하이스쿨)

Who are you?

Who are you and why are you here?

Let go!

Let go of me!

Su A?

Hey.

Su A, come on. Wake up.

Su A...

Su A, wake up. Su A!

Doctor, over here!

Prep the OR and secure a bed in the ICU. Hurry.

Let's move her.

I'm afraid you must stay here.

Don't worry too much.

My Su A...

is strong...

and will wake up soon.

That's also the Su A I know.

Hae Seong!

How's Ms. Oh?

Fortunately, it wasn't a fatal injury.

She hasn't woken up yet though.

Did you look into it?

The scene was processed.

The culprit must've been an amateur...

because he left his DNA all over your house.

- Tell me when the report comes in. - Sure.

Get some shut-eye somewhere.

You look exhausted.

Forget it. As if I can sleep right now.

Hey. How's Ms. Oh?

Is she all right?

Yes, the surgery went well.

I'll get some air.

You should go see Su A. She's in Room 503.

See you later.

Are you okay?

We'll stay behind,

so go home and get some rest.

I'm fine.

It shows that you haven't had any sleep.

- Don't be like that and... - I said I was fine!

Sir.

It's nothing.

Don't mind me and head back inside.

Sure.

I'll see you later.

Hae Seong must be running late.

Skipping classes and being late. He's sort of a slacker, isn't he?

Although, that's what makes him hot.

Hi, guys. It's time for roll call.

Ms. Kim, where's Ms. Oh?

Ms. Oh?

A personal matter came up for her.

That's why I'm here as your temporary homeroom teacher.

What personal matter?

Will she be gone for long?

You brats.

If only you had always been this interested in your teacher.

I'll check attendance.

How are you feeling?

I'm sorry I didn't tell you sooner.

Ms. Oh also came down with something.

They're not kidding about the flu going around.

Anyway, take care of yourself...

and don't forget to submit a doctor's note...

so that your absence can be excused.

Sure.

I'm sorry.

I'm sorry I couldn't protect you.

What? Ms. Oh's in the hospital?

She was brought to my dad's hospital last night...

and was admitted.

Why was she brought in? Is she that sick?

I can't have access to that kind of personal information.

Do you know what's even more crazy though?

It was Hae Seong who brought Ms. Oh to the hospital.

My gosh.

Is Ms. Oh the reason Hae Seong skipped school?

It's highly possible.

Come to think of it,

they've been joined at the hip lately.

This is between a teacher and a student.

Let's not create any sick rumours and watch our mouths.

I'm with Ye Na on this.

We don't know...

why those two were at the hospital.

What if what you said led to weird rumours?

- Sorry. - Sorry.

Can you believe them?

Aren't people allowed to go to the hospital together?

It's no big deal.

Also, being there together...

could be just a big coincidence. Right?

Right, of course. That's possible.

Don't be like that.

What?

You're saying all that to spare my feelings.

There's no need for that.

Right. Was I saying that for your sake?

Weren't you?

I was.

Do you still have feelings for Hae Seong?

I had a crush on him, but I'm going to move on.

He doesn't seem interested in me.

Right. I'm glad to hear that.

What are you doing after school?

Do you want to catch a movie?

I'd love to, but I should get home.

The math competition is coming up.

The math competition?

Yes.

You're competing too, aren't you?

Yes.

I studied really hard this time around.

You'll have to do your best if you want to beat me.

If you're that sorry,

be good to me.

Are you okay?

I was worried.

What a relief.

What?

It was Lee Jun Ho, a teacher at the school,

who executed the exam scandal.

Lee Jun Ho?

Mr. Lee was the proctor during the tests...

of all those competitions.

Don't think about this for now.

I'll take it from here.

You only just woke up and shouldn't be...

- Yeong Hun. - Hey, Hae Seong.

I have the DNA analysis report from the break-in.

But...

it's odd though.

The one at your house...

was Lee Jun Ho.

- Lee Jun Ho was at my house? - Yes.

Lee Jun Ho, the math teacher at Byeongmun High School.

Why did he...

break into your house?

Monitor him closely for now.

Sure. What about Agent An?

Don't tell him.

I'll inform him myself.

He used a knife I had at home.

Not bringing a weapon...

implies that...

hurting me or Su A wasn't part of his original plan.

He was looking for something at my house.

If the file regarding the scandal wasn't his target,

what could Lee Jun Ho have been after?

Who'd want to take the notebook from me?

Seo Myeong Ju.

Goodness. You did well.

However, I heard there was an incident last night.

How will you remedy this situation?

Please keep your word.

If I do what you asked,

you said you'd keep my name out of the school cheating scandal.

Also, you promised...

you wouldn't order me to fix the exams again.

You're bringing up a promise after stabbing someone with a knife?

I didn't know you were a psychopath, Mr. Lee.

I won't ask about the notebook...

or Jeong Hae Seong's identity.

However,

I trust that you'll protect me.

Why should I?

Because my arrest would only put you in a predicament.

So that's how it works.

Sure. Your job is done, Mr. Lee.

You may go. Don't you have classes to prepare for?

I'll trust you to protect me, then.

Mr. Lee.

I appreciate your service.

"The fourth ghost story."

"No one seems to know..."

"what it is."

Anyway, Ms. Seo,

has the school gym gone under renovation before?

What he's saying...

is that only he has the answer.

Mr. Lee took your notebook?

That's probably what he was after.

You were only collateral.

Ms. Seo must be pulling the strings.

We'll have to arrest Lee Jun Ho and make him testify...

to end Chairwoman Seo Myeong Ju,

who deceived the students and played me.

Do whatever it takes to figure out the fourth ghost story.

Considering our situation,

it's too dangerous to keep Jeong Hae Seong...

at this school.

I understand.

What is it, Ye Na?

The upcoming math competition.

Did you plan for me...

to come in first place?

So what if you are?

That's what you wanted to talk about?