When the USS Huron went down off the coast of North Carolina in 1877, she took most of her crew with her and a mystery about why they were headed to Cuba in the first place. When a present-day storm uncovers a long-hidden portion of the wreck, including the captain's lock box, international photojournalist Mike Scott and his friends dive on the wreck to find out more. When the archeologist helping them unravel the contents of the lock box disappears, right after finding a hidden, coded message inside, Mike heads to the Isle of Pines in Cuba, once known as Treasure Island, to discover the secret message that sank with the Huron and the whereabouts of the archeologist. Out of nowhere, a hurricane looms over the island, Mike and his friends are forced to run for cover, both from the elements and the men who are set against them, looking to recover the secret of the Huron themselves.