While Henry and Emmy Tibbett are enjoying a sunny Caribbean holiday, events take an ominous turn when a shrewd old lady who has been staying at their hotel tells them of her strange experience with a vanishing boat, then herself disappears mysteriously. It seems that the peaceful island is menaced by a vicious drug ring that may be hijacking yachts as part of their multimillion-dollar smuggling operation. As the storm clouds gather, Herny and Emmy find themselves involved with modern-day pirates in a case as fast-paced and dangerous as the fierce hurricanes that sweep across the islands.