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.

Yasuaki Kurata plays a masked ring brawler who is out for revenge against an evil, megalomaniac entrepreneur played by Japan's most reliable bad guy of the '70's, Masashi Ishibashi.

Martial artist Takuma Tsurugi returns to take on a Yakuza family that may be embezzling money from charities to finance their own operations. Both the police and the Yakuza find themselves battling Tsurugi, but Tsurugi's fight ultimately is with the mob, and he concentrates on them.

Based on the manga by Tetsu Kariya and Ryouichi Ikegami.