The plot concerns a unit of US marines operating in the Vietnam war during 1970, with the movie opening on a raid in a village. After massacring the villagers, the marines steal the villages gold, much to the objection of their Vietnamese translator and guide. Skip forward past the credits sequence; it's now 15 years later, and members of the unit are getting murdered one by one. This leads to the former head of the group, now a high ranking military officer, announcing that the only person who is up to the job of finding out the identity of the killer is an Aussie, Major Brad Cooper.

Andi joins her husband Tim on a tropical island to help him with the capturing of poisonous sea snakes for their venom. Her flagrant sensuality attracts the attention of hired hand Dak, and when Tim becomes bitterly obsessed with his faltering job, Andi shares an intimate afternoon with the obsessed crewman, but then refuses to continue the affair, which leads the jilted lover to begin a series of escalating violent events.

The story is the usual mumbo jumbo about a hidden manuscript with secret techniques And Bruce has to fight a lot of enemies to find it, including a giant masseuse, a gang of midget hitmen and a samurai warrior.