The story begins with a violent encounter between Jang and a mysterious serial killer. Surviving the attack, Jang becomes obsessed with tracking the killer, but his methods clash with the law. Detective Jung Tae-seok sees an opportunity to solve the case and proposes a reluctant partnership. Together, they pool resources, mixing Jang’s underground network with Jung’s official channels. However, their conflicting motives—revenge versus justice—create tension and drive the narrative forward.
