A team of deep sea divers, led by wealthy American tycoon George Harrison (Ashley), attempt to salvage a fortune in diamonds from the wreckage of a ship that sunk 60 years earlier off the coast of Africa. When the team arrives, they discover that the ship is cursed and the diamonds are protected by the ship's undead crew, now zombies, who are forced to guard the treasure until the diamonds are destroyed or the curse is finally lifted.