Mobsters are smuggling guns into Hong Kong. The police orchestrate a raid at a teahouse where an ace detective loses his partner. Meanwhile, the two main gun smugglers are having a war over territory, and a young new gun is enlisted to wipe out informants and overcome barriers to growth. The detective, acting from inside sources, gets closer to the ring leaders and eventually must work with the inside man directly.

Frank Dux has spent most his life being trained by Tanaka to participate in the Kumite, the ultimate martial arts tournament, where participants are seriously injured, even killed. Frank decides to go despite being told by his superiors in the army that he can't because they need him. Two army officers are sent to get him and the trail leads to Hong Kong but Frank eludes them. While Frank advances, he knows that he may have to face Chong Li, the defending champion, who has killed a few participants.