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.

The superhero The Kagestar fights the monsters of the Satan Empire.

Based on the comic by Tetsu Kariya.

This is the third and final film of the ZA KARATE trilogy. Tadashi Yamashita reprises his role as the Karate World Champion. Local Japanese karate schools are not happy that a Chinese master will take over the Japanese karate organization and will do everything they can to prevent it.