Set in Macao, the film finds Richard Jaeckel cast as a two-fisted, womanizing private detective. He has been assigned to track down an international crime ring, run by the sort of folks who have no qualms about knocking someone off just to keep in practice.

After the fall of the Philippines in World War II, the Japanese discover that Gen. MacArthur ordered millions of dollars in silver dumped in Manila Bay in order that it not fall into enemy hands. Among the prisoners the Japanese have taken are two American U.S. Navy deep-sea divers, whom they then force to dive in search of the sunken treasure.