Sign (Ssain / 싸인)

=The public institutions represented in this drama are not related to the real ones.=-

20 years ago, 5 people were killed. -=The public institutions represented in this drama are not related to real ones.=-

20 years ago, 5 people were killed.

Now, another 5 lives were taken.

A silent killer.

Antimony..

No one could detect it; it's perfect for killing people.

In the case of chronic poisoning,

it also delays decomposition of the body.

The day I first saw you, 20 years ago,

was also the first time I forged an autopsy report.

That was the price for getting a huge grant from politically connected contacts.

Accepting their offer would support NFS's operations.

Although it's a weak excuse,

I really can't give up the National Forensic Service.

The foundation of the National Forensic Service autopsy system,

Do you know what it is?

It is power.

The only way to hide my secret,

and not deceive you,

..is this.

If Representative Director Jeong Cha Yeong 's crime is exposed..

Director Jung Byung Do's reputation,

and the prestige of the National Forensic Service,

will be ruined.

The past 20 years I've spent with you...

have been the happiest of my life.

I am sorry.

And, I will always love you.

I wish to call another witness.

In the case of February 9th,

-= Episode 13 =- In the case of February 9th,

In the case of February 9th,

you performed the autopsy on Han Tae Joo, is that correct?

Yes.

Was antimony found...

in Han Tae Joo's blood?

Yes.

126 micrograms of antimony was discovered.

No further questions.

However...

I cannot determine if the 126 micrograms of antimony discovered

constituted a lethal dose.

There haven't been any studies establishing the lethal dose of antimony.

Therefore, I am unable to conclude that antimony poisoning

caused Han Tae Joo's death.

The findings from my autopsy are...

Han Tae Joo's death was not caused by poisoning,

but, by acute internal causes.

This type of death is...

Natural death.

No, it's not.

Han Tae Joo died of antimony poisoning.

Just like the other employees of HanYoung Group.

The main internal organs showed no signs of causing a natural death.

The completed examination revealed a blood level of over 100 micrograms of antimony. Therefore,

Antimony has been determined as the cause of death.

Examiner Go Da Kyung...

Before this case,

Have you ever examined a victim of antimony poisoning?

If the antimony is ingested orally,

or is transmitted through skin contact,

the lethal dose should be different in the two cases, shouldn't it?

What are the lethal doses in each case?

What if antimony is administered not all at once, but over time?

Are Asians and Westerners equally susceptible?

Do you know all that?

Even if more than over 100 micrograms of antimony is detected,

we cannot conclude that it is the direct cause of death.

Doctor...but...

The deceased, Han Tae Joo...

What caused the acute cardiac arrest is unknown.

Perhaps pregnancy disturbed her heart rhythm.

In any case, her death was natural.

End of testimony.

Director Jeong Cha Yeong!

How are you feeling?

Are you really connected to this case?

What are the results?

How would you describe your feelings at this moment?

Please speak!

What was Dr. Yoon Ji Hoon doing?

Did Jeong Cha Yeong buy him off?

He's not that kind of person.

Then, how could he testify like that?

What happens next?

The judgment of the Citizens' Committee is not final.

If new evidence is found,

there are grounds for an appeal.

All right.

If new evidence is found, this case is not over.

Where are you going?

I'll go and see Lee Cheol Eon.

He should have discovered something.

I'll look for Dr. Yoon Ji Hoon.

He must have had a reason for what he did.

Doctor!

Sir...

This is the last thing I can do for you.

Rest in peace.

I...

When Jung Byung Do was alive...

This is what I told him.

Simply confess everything to you.

You would eventually find out.

It can't be prevented.

Therefore, simply confess.

And, allow you to share the secret.

But he decided...

to kill himself.

He didn't want to reveal the secret.

Everyone wants to achieve something in life.

Money, honor, fame...

No matter what it is,

Everyone has something important in life that they want to protect.

That's how people are.

You made a very difficult choice.

Thank you.

It is painful.

In the beginning, I was like that, too.

Choosing between a physician's conscience and reality...

can be painful, indeed.

It's not for the National Forensic Service.

Neither is it for you.

It's for the person who once was my teacher,

Director Jung Byung Do.

No matter what you did it for,

your testimony was correct.

Just like you said, there is not enough evidence...

about the lethal dose of antimony.

On the evidence presented,

Jeong Cha Yeong can't be convicted of murder.

That case cannot be won.

I only eliminated antimony as the cause of death...

Not Jeong Cha Yeong.

I will find other evidence.

Jeong Cha Yeong will be punished accordingly.

It is already too late to turn back.

You have crossed the river with no road of return.

Doctor!

What are you doing?

What do you think?

I want us to go together.

Where?

Wherever you're going.

I'm going alone. Get out.

I don't want to.

You told me,

In order to help you maintain your objectivity,

I should accompany you.

My job is to make sure that

the results are not unduly influenced by your personal feelings.

I won't always agree with you but, here...

Your testimony was not wrong.

I was wrong.

You're looking for evidence proving Jeong Cha Yeong's guilt, aren't you?

Doctor.

Even if no one else believes you,

I do.

So, let's go together.

Bae Song Jin's corpse was transferred to NFS, right?

Dr. Kang scheduled the autopsy for today.

What is it about Bae Song Jin?

The others died a few hours after they were poisoned,

but, in Bae Song Jin's case, the delay was less than 10 minutes.

We must check out Bae Song Jin's condition during his final moments alive.

He is different from Han Tae Joo.

You cannot see any pain at all.

It's a different poison.

It's not what was used in the other cases.

He picked another poison.

If that's the case,

why did he change his pattern?

He's become addicted to killing.

Once you feel that you have control over people's deaths...

you mistakenly think of yourself as a god.

Antimony is not suitable for that.

Antimony is not the poison in this case.

If the lethal dose of this other poison is known,

then we can catch Jeong Cha Yeong.

Jeong Cha Yeoung's father was the kind of person

who wouldn't look for poison outside his own company.

However, it's possible that Jeong Cha Yeong got the new poison from outside the company.

For the last 20 years, the company was in the steel and iron business.

I still think that Jeong Cha Yeong found the poison through the company.

When Jeong Cha Yeong became Representative Director,

he sold the steel company.

So, what about pharmaceuticals?

Let's look at acquisitions over the past few months.

I am investigating the strange deaths at HanYoung Group.

Where is Lee Cheol Eon's desk?

That corner.

What's your business?

I'm Lee Cheol Eon from the Research Institute.

I have an appointment with the director.

You're a little early. At the moment, the Director is busy with something.

Please, go in and wait.

Here, look at this.

=Han Young Pharmaceuticals invests 5,000,000,000 won in the research and development project of blowfish toxin as a new medicine=-

= Although poisonous, blowfish toxin (tetrodotoxin) is used medicinally as an analgesic, inhibitor of muscle contractions, and has potential in treating cardiac arrhythmias. = -