When a senator's new wife is murdered, the prime suspect is his ex-wife, Laurel. Laurel's brother-in-law, lawyer Paul Madriani, still reeling from the death of his wife, takes on the case.

Sir Harry Oakes is a wealthy magnate, living amongst the British aristocrats who have made their home in the Bahamas just prior to World War II. Their small community is one of privilege and status and when Sir Harry's beloved daughter marries a handsome but penniless gigolo, Alfred De Marigny, Sir Harry is outraged by the union. But before Sir Harry can break up the marriage he is brutally and viciously murdered and his son-in-law is the prime suspect. Nothing is as it appears and Sir Harry's death soon points towards intrigue and deception on an international scale.

A scuba diving instructor, her biochemist boyfriend, and her police chief ex-husband try to link a series of bizarre deaths to a mutant strain of piranha fish whose lair is a sunken freighter ship off a Caribbean island resort.