A mysterious figure with shady whereabouts and superb skills appears in the city, and he frequently robs the huge sums of money carefully hidden by the wealthy Lee Jung-min (Kim Soo-ro). Lee Jung-min, who is good at both black and white, is furious and sets a dragnet, vowing to capture this mysterious man who is about to make him penniless. At this time, the local prosecutor (Sung Dong-il) who lives in poverty breaks into his territory and threatens to investigate Lee Jung-min's crime of monopolizing the market through bribery and violence. Lee Jung-min uses the means of winning over and threatening to confuse the public and make the prosecutor catch the mysterious figure for him. In secret, the perverse and suspicious Lee Jung-min, through investigation, sets his sights on the lover of the prosecutor's sister (Lee Si-young) - the gentle and elegant piano teacher Hong Wuhe (Lee Beom-soo). Who is the mysterious man who plays with the rich? Who is the final winner? The contest between good and evil begins...