Mansei (Hiroshi Miyauchi), an undercover police officer in Hong Kong, is kidnapped during a drug bust by a ruthless kingpin named Kakuzaki (Bin Amatsu). Lee's sister, Koryu (Sue Shiomi), a kung fu master, vows to rescue her brother. Before embarking on her mission, Koryu goes to her former dojo to ask for help, and Hibiki (Sonny Chiba), a notorious street fighter, agrees to aid her. But, before they can confront Kakuzaki, Koryu and Hibiki must battle his army of deadly martial arts experts.