 Divers Brad and Tony arrive in Jamaica to attempt salvage of the "Lady Luck," sunk with all hands and a million in gold. They charter a boat, "American Beauty," skippered by attractive Terry McBride, but cannot find the ship. But there s more to the "Lady Luck" than meets the eye, and undersea skullduggery forms a counterpoint to Brad s romance with Terry, and Tony s with cabaret singer Venita.