Jo Pil-ho is an
Ansan-based corrupt homicide detective. His money is tied up in a suspect real estate deal, with Internal Affairs breathing down his neck. Desperate, he robs a police warehouse with the help of Gi-chul, his informant turned reluctant partner-in-crime. After Gi-chul breaks in, the warehouse explodes, killing Gi-chul and leaving Jo unconscious. At the scene, a fireman steals Gi-chul's phone and hands it to an unknown party for
forensic recovery. The warehouse's owner's body is found the next day in an alleged suicide. The fireman is also killed in a restroom. It is revealed that the explosion destroyed all evidence implicating the CEO of the largest Korean corporation named the Taesung Group, in a multi-million dollar scandal. Gi-chul's phone contains footage of Kwon Tae-Ju, a Taesung Group employee, breaking into the warehouse before the explosion. Waking up in the hospital, Jo is questioned by the officers. As he denies involvement, Jo learns that Gi-chul was murdered before the explosion. Jo gets to Gi-chul's apartment where the two stashed their earnings, but the money had been stolen. Jo views CCTV footage and identifies Jang Mi-na, Gi-chul's girlfriend. At her workplace, he meets the father of Song Ji-won, Mi-na's close friend. Ji-won was a female officer who died in the
Sewol Ferry incident. Jo tracks down Mi-na to a motel and catches her and her friend So-hee. Wholly focused on retrieving his money, he handcuffs them both to his car and drives to Mina's address, ignoring Mi-na's claim that she received a video message from Gi-chul. Mi-na tazes Jo, causing him to crash his car, and escapes with So-hee. Back at the station, Jo learns that Gi-chul sent the footage to Mina's phone before his death. Public prosecutor Nam Sung-sik tells Jo to retrieve the footage in exchange for getting his name cleared. To his relief, Jo finds Mi-na's phone in his car (having confiscated it from her earlier) but it is locked. He goes to her address and finds part of his money stash, but runs into Kwon. After a brief fight, Kwon knocks Jo unconscious just as Mi-na gets home. Kwon prepares to kill her and pin the blame on Jo. Jo wakes up and tackles Kwon, causing both to fall from the apartment. The noises catch the neighbor's attention, and Kwon retreats. Jo drives Mi-na away in his car. She agrees to unlock the phone if that he pays for So-hee's abortion at an illegal abortion clinic. He complies and, after the abortionist pays him for one night with Mi-na (mistaking him for their pimp), Jo savagely beats up the man. Nam calls Jo, who reveals he has Mi-na with him, and agrees to deliver her as a key witness in exchange for a promotion. Jo takes the girls to his house and leaves So-hee under the care of Hee-sook, his wife. As he drives Mi-na to the rendezvous point, he learns that she had been fighting depression and suicidal thoughts since Ji-won's death. He promises to take her back to Ji-won's father's diner for a meal after she finishes giving her testimony. The rendezvous, however, turns out to be an ambush as Nam is on Taesung Group's payroll. They torture Jo and threatens to kill Mi-na. Jo lies and convinces them to spare Mi-na and him in exchange for the remaining footage. Kwon agrees and releases Mi-na. However, the girl, having lost her will to live, jumps off the building. Jo is then taken to meet CEO of the Taesung Group, Jung Yi-Hyang, who offers him money in exchange for the video. A short while later, on the day when Taesung Group organizes a scholarship event, Jo visits their headquarter. He calls Internal Affairs officer Kim Min-jae to claim involvement with Taesung Group, and challenges the man to catch him. Jo assembles a gun made from non-metallic parts and prepares to kill Jung. However, his actions are discovered. He is subdued, cuffed and thrown inside a soaking tub to drown. While Jung is addressing the students, Jo escapes his confinement. He attacks the guards and retrieves his gun, and fatally shoots Kwon. He then heads to the stage and shoots Jung in the head, before Kim shoots him. An employee of Taesung Group steps forward to testify their involvement in destroying the evidence. Nam is also involved. Jo survives the wounds and is charged with murder. Hee-sook adopts So-hee. On the way to the trial, Jo hallucinates Mi-na sitting among friends, smiling at him. ==Cast==