In November 2015 as the heavy rain is falling, a man dumped a young female body in the river. The murderer then left his watch at the scene.

A few weeks later, Lee Dae Chul was arrested and sentenced to death for two murders of a college student and a detective, who is involved in solving the case. Detective Kang Do Chang handled the case and was relieved when the court finally resolved the crime.

Five years later, Ji Hyeok attended an auction and bid the highest price for a rare watch. Later that night, he traveled to Incheon Soebu police station and slept on the couch.

Minister of Justice, Lee Gyu Jo signed the execution order for the list of legal procedures. Lee Dae Chul is included on the list. The list will be sent to the President's office for the final decision. It seems the higher officials wanted to open the death penalty of the country.

Chief Woo introduced detective Ji Heyok to the new team at the Violent Crime Unit Two. After a year of break, he returned to service. Detective Do Chang is his new partner, who is not happy to have him around.

Yoo Jung Seok works at the Junghan Daily news. He is working closely with the minister's office for any high case that is sensitive to the media. He asked reporter Jin Seo Kyung to cover Lee Dae Chul's case and the other 12 prisoners on the case. He requested Seo Kyung to interview the victim's families and required the report on his table the next day.

Ji Hyeok handled a missing person case which is Lee Dae Chul's daughter Eun Hye. He went to see the young girl who reported to the police. The department received a second call for a murder, which links to Lee Dae Chul's case where dead bodies were found five years ago.

Reporter Seo Kyung interviewed the victim's relatives for the result of the death of their family member. She also visited the murdered detective wife but she chose not to give more information and left the cafe.

Both detectives visited the reported location for the crime scene but there has been no evidence found. Ji Hyeok saw a wildlife camera installed in the area, he went to get a record of the past days.

That evening, Chief Woo met the whole team for a meeting and at the same time to welcome Ji Hyeok. They were about to wrap up the night when Ji Hyeok received the access of the video. He saw Eun Hye walking at the place with a man. Ji Hyeok advised Do Chang and took the whole team's attention towards the video.

Lee Dae Chul's complicated case might be in the hot seat. Though he is on the death row case, his daughter's reported missing might affect the closed case.

While the team watched the video, a man approached the unit and submitted himself responsible for killing Eun Hye and buried her body after the incident.

Do Chang and the rest of the team got shocked and put the man in the interrogation room. His name is Park Gun-Ho, a missionary and works as an officer at the prison where Lee Dae Chul is in custody.

The following morning, the two detectives went out to the field to check where the body was buried. But Gun-Ho always states that he never remember anything. They returned to the station empty-handed. This frustrates Do Chang knowing that the old Lee Dae Chul's case might be reopened.

He admitted the crime and gave no other information to Do Chang and Ji Hyeok.