Two men, one a businessman skilled in Kung Fu, the other a kickboxer discover they are brothers, and together, both in and out of the ring, they must face a crime syndicate. One of the first films to use the martial art of Muay Thai.
| Production | Runme Shaw | Producer |
| Writing | Ni Kuang | Screenplay |
| Directing | Chang Cheh | Director |
| Crew | Tong Kai | Martial Arts Choreographer |
| Crew | Lau Kar-leung | Martial Arts Choreographer |
| Camera | Kung Mu-To | Director of Photography |
| Art | Johnson Tsao Chuang-Sheng | Art Direction |
| Sound | Frankie Chan Fan-Kei | Original Music Composer |
| Costume & Make-Up | Li Chi | Costume Design |
| Editing | Kwok Ting-Hung | Editor |
