Tae Seok is a detective who's tormented by a pang of guilt that he missed the culprit that murdered a high school girl named Yeo Wool in 2005. Now Tae Seok meets with a prosecutor, and he turns out to…

With a strong belief that Prosecutor Jang Hyun Min is the abductor, Tae Seok starts to look into Hyun Min’s background and past. When he sneaks in Hyun Min’s house, he’s reminded of when Yeo Wool and …

Prosecutor Jang Hyung Min who fell from the stairs gets taken to a hospital, but he remains unconscious. The police higher-ups discuss whether to punish Tae Seok for letting Hyung Min fall and get sev…

Tae Seok continues to suspect that Reporter Eun Seon Jae is a psychopath killer who murdered her parents and dog. Rather than getting frightened or denying, Eun Seon Jae seems to enjoy getting suspect…

Tae Seok finds Yeo Wool's name tag from Seon Jae. He questions how she knows Yeo Wool, but Seon Jae only gives a vague answer. Tae Seok starts to look into the relationship between Yeo Wool and Seon J…

Seon Jae tries to poison Song Man Soo who is in prison now and asks him why he killed Yeo Wool in the past. He says it was Jang Hyung Min who killed Yeo Wool, and not him. In the meantime, the man who…

When Tae Seok arrives at the hospital, Jang Hyung Min is awake and still remembers that Tae Seok let him fall from the stairs. In the same room, Seon Jae is expecting Tae Seok to come. Meanwhile, the …

Jang Hyung Min plans to reveal what Tae Seok and the police did to him to put Tae Seok in a pickle. And even a press conference is held to question Tae Seok. In the meantime, Song Yoo Jin escapes from…

Tae Seok continues to chase Hyung Min, who is receiving help from Chun Man. They end up cornering him at a shopping mall but he manages to slip away. Right before having Hyung Min on his hands, Tae Se…

Young Hyun Min, known as Seon Ho, encounters Tae Seok’s little sister and her friend. The two high school girls witness a brutal murder that he commits, but Seon Ho knows that they can’t just go to th…

Tae Seok seems to be trying to hide his sorrow over Hae Jun's death, and his colleagues console him. In the meantime, another murder takes place, and it seems to be done by Jang Hyung Min who is known…

Following a hunch, Tae Seok finds out who the masked serial killer is. As soon as he spots the killer who has shown up again at the scene, Tae Seok starts to go after him. They end up in dark butcher …

Tae Seok tries his best to find Dong Yoon by not following the official manual. Dong Yoon remembers what Tae Seok said before, and tries not to provoke the murderer, Joo Seong. Meanwhile, Chun Man get…

Detective Chae learns that there's one more woman that the masked killer is after. In the meantime, Tae Seok manages to find the traces that lead to the location where Detective Chae is locked in. Whe…

Seon Jae gets arrested as a suspect for murdering Go Joo Seong. She tells that Jang Hyung Min is the one who killed Go Joo Seong and she saw him for himself, but the police, except for Tae Seok, would…

As Chun Man suggested, Tae Seok steals diamonds from the chief's safe. Tae Seok and Chun Man go to deal with the smugglers, but things go south. Tae Seok manages to rescue Jeon Joo Hyun, but the smugg…

Another woman is murdered by Jang Hyung Min and strangely this time, his fingerprints are found everywhere as if he’s provoking the police. The killer leaves behind a photo of a woman. To prevent anot…

Jeon Chun Man tells Jang Hyung Min to end their relationship, but Jang Hyung Min insists that Jeon Chun Man should continue to share the inside information of the police. Meanwhile, following the evid…

Jang Hyung Min narrowly runs away from the police with the help of Jeon Chun Man. Knowing that Jang Hyung Min is after Tae Hee, Tae Seok brings her to his house for her safety. Meanwhile, Eun Seon Jae…

Detective Chae is told to tail Jeon Chun Man, but he soon gets caught. And Jeon Chun Man gets into the vault without being caught. In the meantime, Tae Hee gets abducted by Jang Hyung Min. He tells Eu…

Seon Jae and Tae Hee are kidnapped by Hyung Min, and Tae Seok tells Hyung Min to kill Seon Jae. Even though Hyung Min is killed at the firearm incident and the rest are safe, Tae Seok is still confuse…

The Punisher has captured another criminal and started a broadcast. He wishes the public to decide the criminal’s fate by vote. The only way to save the criminal, Jang Seok Goo, is to ask his victim, …

Tae Seok and his team members locate where Punisher and Jang Seok Goo are and manages to rescue Jang Seok Goo. Punisher runs away and Tae Seok goes after him. Based on what Punisher has told about his…

Tae Seok plans to use Kwon Soo Chul as a bait to catch Kang Woo Joon. On the day Kwon Soo Chul is discharged from the prison, Tae Seok and Detective Chae take Kwon Soo Chul to a safe place. Meanwhile,…

A teller has been murdered but it was no ordinary crime. It is a murder that is similar to a serial murder case that was unsolved for 20 years. Whether it is the same culprit or not is up to the team …

The serial killer from 20 years ago has revealed himself to the police. However, due to the statute of limitations, the police cannot arrest him. The problem now is to figure out who the recent murder…

Lee Sung Hak says he didn't kill Kwon Ji Sook, and there was another witness at the crime scene back in 20 years ago. The police continue working to find evidence of the murder case. And the police co…

Tae Seok and his team members catch Yoo Jung Soo at a crime scene and start to question him. Meanwhile, Tae Seok and Mun Gi continue to work to find out if Eun Seon Jae really killed his parents and i…

Manager Seo visits Tae Seok to give his confession. Manager Seo claims he was the culprit for the murder of Eun Hong Goo and Park Jung Sook. Tae Seok and his team believe it wasn’t him, but he knows t…

Ms. Hwang, who has lost her son, is being accused of murdering the hospital director. She is fully aware of what happened to the director but refuses to talk until Tae Seok finds out what happened to …

Seo Jae Geun tells Tae Seok everything from how he got involved with Eun Seon Jae and her foster parents to how he has recently ended up with making a false statement. Meanwhile, Detective Chae is ask…

Tae Seok tuns on the recorder that reveals the fact that Jeon Chun Man helped Jang Hyung Min for a long time. Humiliated by Tae Seok In front of other police officers, Jeon Chun Man tries to take the …