A wreck off the Cornish coast reveals clues to a mystery that marine archaeologist Jack Howard had thought beyond solving. He embarks on an epic quest that takes him to the sunken ruins of the pirate city of Port Royal in Jamaica. But the spectre of the deadly Inquisition dogs his every step, and Jack must face a descent into hell itself if he is to uncover the greatest reward in Christendom. The Indiana Jones of marine archaeology is back!