安德鲁·浩二回归主演，故事设定在19世纪后期的旧金山唐人街，聚焦安·山姆（安德鲁·浩二饰演），一个武术天才从中国移民到旧金山，并逐渐成为唐人街各大帮派里最强大的杀手。

　　Masked figures with machine guns march into the secondary school in Karatas, take the pupils hostage, and execute one of them. They make no demands.