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 sly gangster hatches a plot against his own wife, who works at a brothel-cum-bathhouse, with the help of the bathhouse owner’s wife.
Sakata protects a little boy while coping with rival gangs.
