This lavish, suspense-filled film was made from Peter Benchley’s best-selling novel. Gail Berke and David Sanders are on a romantic holiday in Bermuda when they come upon the sunken wreck of a WWII freighter. Near it, they find an ampule of morphine, one of tens of thousands still aboard the wrecked ship. Their discovery leads them to a Haitian drug dealer, Cloche, and an old treasure hunter, Romer Treece. With Cloche in pursuit, Gail, David and Treece try to recover the sunken treasure.