Late autumn 1977, Byrney and Fionn having re-joined the crew of the forty year old, Vintage motor yacht, Liberty Angel are destined to sail across the Atlantic ocean and take up winter charters around the southern coast of Antigua. Eagerly awaiting their arrival are a group of suspicious looking, American divers, who have been possibly lured there by a vast, sunken, cache of Spanish gold and silver which has so far eluded every would be bounty...