After Park Jung-Hwan (Kim Rae Won), the chief of the anticorruption analysis team for the Supreme Prosecutors' Office, finds he has a malignant brain tumor that offers him only 6 months to live, '' he decides to throw his final encounter at the offender world before he says farewell to lifetime. While he was once a dishonest leader himself, making threatens to attain his position of power, Park makes the decision to redeem himself by he taking down the tainted Public Prosecutor General Lee Tae Joon (Cho Jae Hyun). Inside his pursuit, he recruits the support of Shin Ha Kyung, his exwife and mother of his son who advised him because he was focused on power and status and it is now an erect prosecutor herself. Will he also redeem himself from his family's eyes, although park is determined to redeem himself to the Earth?