When they are caught in a storm, Pirata and Capitano crash-land the hydroplane on a deserted island. Before the radio stops working, they manage to alert their friends that they’re on Thousand Carat Atoll. | On Skeleton Island, Roberto finds a treasure map signed by Boney Boots, one of his ancestors. He gives it to Pirata and Capitano. Our two pals immediately suggest going on a treasure hunt.