Sing Gwok-dung is upset when he is transferred from the Anti-Serious Crime and Triad Organization to the frivolous Anit-Swindler Unit. He is reluctant to cooperate with his new superior Gong Yut-guk, but changes his attitude when his idol, Inspector Lam Zi-ho, commits suicide. Conned by swindlers, Zi-ho is in heavy debt. He has no way out but to kill himself. Gwok-dung is determined to avenge for Zi-ho, but when he and Yut-guk trace the cause of Zi-ho's death, they are unprepared for what they discover.
