"The western part of the prosecutor's office has been contacted by Park Moo-sung, who was the sponsor of his colleagues' testimony, to inform him of the corruption of the prosecutors.\n\nBut he is stabbed by a knife and is dead. The witness arrests the murder suspect urgently and finds decisive evidence to resolve the case. However, The suspect claims to be innocent ."

"A suspect caught by the witness appeals for unfairness and commits suicide. After his death, Lieutenant Lieutenant Police in charge of discovering evidence that the suspect is not the criminal. In the meantime, Kyok-Mok suspects Lee Chang-jun, former minister of Park Moo-sung, who died before he died ."

"Eun-su, who was in charge of the suspect's trial, suffers from the stigma of the murder test, and the witness is placed in a position to receive an interrogation. In order to prevent the excuse from being investigated, the witness who started the re-examination of the witness finds out that the last person he met before his death was the western witness."

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

"Si-mok, puzzled by the details of the most recent murder case, visits the victim's home to seek more clues. Yeo-jin joins him in the investigation."

"New pieces of evidence only increase the list of possible suspects. In the midst of the confusion, a few begin to question Si-mok's innocence."

"Si-mok and Yeo-jin team up to covertly pursue Seo Dong-jae. Just as Dong-jae is about to throw something into the Han River, Yeo-jin stops him."

"Enraged by what the police did to Park Kyung-wan, Yeo-jin tries to confront her superior but is stopped by Si-mok, who warns her of the consequences."

"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."

"The truth behind Ga-young's convulsions is revealed. Chang-jun's wife receives a travel ban. Woo-gyun asks Chang-jun to help him get out of his mess."

"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."

"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."

"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."

"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."