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.

Policeman Don Lee often works with informants but numerous too-close calls and failed missions cause him to see the world as one betrayal after another - then he meets Guy, and is given a new chance to change his views.