Byun Jae-Wook (Hwang Jung-Min) is a short-tempered prosecutor who only pursues the truth. He is famous for his tough investigations. A suspect, under the the interrogation of Byun Jae-Wook, is then found dead. Byun Jae-Wook is arrested and gets 15 years in prison.
Five tears later, Byun Jae-Wook meets good-looking con man Chi-Won in prison. Chi-Won knows about Byun Jae-Wook’s case. Byun Jae-Wook feels Chi-Won could carry out his plan outside of prison. Using his knowledge as a former prosecutor, he gets Chi-Won acquitted. Byun Jae-Wook prepares a counterattack on those who framed him. Chi-Won though looks for a chance to get away from Byun Jae-Wook.