Michael, a police officer, is on the trail of an unusual serial killer named Sung Ping. Ping impulsively murders a corrupt triad member and, finding satisfaction in the chaos, starts plotting more murders, much to the alarm of the local triad groups. At the same time, a journalist named Hak turns these real-life crimes into material for his crime fiction series. However, Ping starts drawing inspiration from Hak’s stories for his own schemes, leading Hak to worry that he might be inadvertently influencing the killer’s actions.