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Si-mok sets out to meet the one he believes is the real murderer. He gets his hands on a bag that will determine the futures of many people.

Yeo-jin suspects a new killer is involved in the latest murder incident. Meanwhile, Si-mok collapses after leaving the autopsy.

Yeo-jin collects evidence as Si-mok interrogates the suspect. Many questions get answered, but the most important problem of all remains to be solved.

While getting to the truth about the night of the attorney's death, Si-mok and Yeo-jin learn about the involvement of a mystery person.

Returning home from the rooftop party, Si-mok discovers that an intruder has left something in his bedroom. Yeo-jin and Geon come over right away.

Details of the cover-up become public, but Si-mok isn't finished asking questions. The police-prosecutor council is called off.

A suspect is arrested, but Dong-jae remains nowhere to be found. In the interrogation room, Si-mok and Yeo-jin try to draw out a confession.

Si-mok and Yeo-jin discover perplexing leads while searching Kyung-wan's basement. Dong-jae goes back to Chang-jun's office to fetch his cell phone.

Si-mok selects key lawyers and police officers to be part of the special investigations team. Their probe begins with Dong-jae as the starting point.

Fearing for Ga-young's safety, Yeo-jin proceeds to transfer her to a different hospital. A nurse informs Yeo-jin of something strange that happened.

Si-mok is ordered to find out what Yeo-jin knows about Bit's file. Ahead of a vote on the fate of her seat, Yeon-jae sets up an important meeting.

Police and prosecutors each prepare members for joint discussions on investigative authority. Dong-jae brings Woo Tae-ha some cases of interest.

On a foggy night, two college students drown at the beach. While Si-mok investigates, Yeo-jin tracks down a man who was at the scene of the incident.

In a heated first session with prosecutors, Geon makes a pointed argument. At Hanjo, Lee Yeon-jae faces an oncoming family power struggle.

At the prison to interrogate an inmate, Yeo-jin runs into Si-mok and Dong-jae. Choi Bit has Yeo-jin deliver a mysterious file to an assemblyman.

Yeo-jin recruits Geon. Digging into a policeman's death ruled as suicide, Si-mok and Dong-jae find signs that point toward a different story.

Leading police efforts to locate Dong-jae, Yeo-jin connects the case to that of the dead policeman. Si-mok pays Yeon-jae a visit.

Si-mok volunteers to appear on live national TV to discuss Kang Jin-seob. He also makes a bold promise to find the culprit within two months.

As a teen, prosecutor Hwang Si-mok received surgical treatment for his abnormally developed brain, but the procedure left behind serious side effects.

Rumors quickly spread about Si-mok's violent nature. Regardless, he persists in his investigation. He finds his mentee, Young Eun-su, suspicious.