Sir Harry Oakes, a wealthy British aristocrat is murdered by his son-in-law, revealing international intrigue and deception in the Bahamas before World War II.
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.
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.