The second in the series of books about the Life of Lieutenant Benjamin Burrows RN. This adventure is set in the Caribbean during the Napoleonic wars at a time when Britannia ruled the waves and other nations looked on in envy. Slavery is being outlawed by Britain, but many of her adversaries still want to persist with the trade. Ben's ship is set the task of stopping them, a difficult almost impossible job for one ship in such a huge ocean. Life in the navy is hard and dangerous, and despite some close shaves, Ben has survived and risen to second lietenant on the frigate Adventurer. The ghosts of pirates still haunt the seas and Ben is convinced he has a genuine treasure map that belonged to Captain Kidd, but he needs an angel to show him the way.