Xie Xiuyong

Li Mansei is a martial-arts champion turned undercover agent. When he is captured by a drug lord, his sister Li Koryu turns to his former martial-arts school, including the powerful Sonny Kawasaka, for help in the inevitable battle royale.

A self-destructive man becomes a powerful member of the yakuza but quickly loses his self-control. Based on the true story of Rikio Ishikawa.