A pair of Hong Kong cops, Ricky and Maskles (meaning `muscles’), find themselves in Tokyo in search of a fugitive criminal. Here a major setback awaits the buddies – Ricky is kidnapped by Japanese gangsters. But Masklesa to help from Hong Kong hastens reinforcements in the face of… small-time crooks, who manage to get into the most horrible and funny trouble. However, among them there is a professional – a beautiful policewoman Miss Wu, whose fight with a Japanese woman became a textbook for the martial arts genre.