Park Jung Hwan (Kim Rae Won) is the chief of the anti-corruption investigation team for the Supreme Prosecutors’ Office. To get to his position, he has made compromises on achieving justice. Park then learns that he has a malignant brain tumor and does not have much time to left. To end his life without regrets, he points a gun at corrupt Public Prosecutor General Lee Tae Joon (Jo Jae Hyun).

Meanwhile, Park Jung Hwan’s ex-wife Shin Ha Kyung (Kim Ah Joong) is a prosecutor who has refused extremely high-paying jobs at large firms, and instead fights for justice. She knows about Park Jung Hwan’s situation and helps him.