Prosecutor Jae-wook, specialized in violent crimes, detests the criminals and doesn't give a damn about their human rights. One day, while interrogating Jin-seok, a suspect looking insincere, Jae-wook loses his temper again and beats him. The next morning when Jae-wook comes back to the interrogation room, he finds Jin-seok dead. Jae-wook is charged with murder and arrested. The Prosecutors' Office including Jae-wook's boss and close colleagues desperately try to find a way out of this trouble leaving him as a scapegoat. Jae-wook claims his innocence but gets sentenced 10 years to prison. In prison, Jae-wook meets a handsome, even petty criminal, Chi-won and finds the clue of the scheme which put him in prison. Jae-wook asks Chi-won to join forces with him and begins training him to reveal the scheme and get his revenge.
