The year is 1723 and the condemned pirate, William Benton, awaits his appointment with death at Execution dock. To pass the time he recounts tales of his adventures to the naïve young journalist, Nathaniel Bagshaw, who hopes to publish a popular book on pirate histories. Benton's story begins in 1718, when the pirate stronghold of Nassau is under threat and its inhabitants are torn between accepting the King's pardon or continuing their precarious life as sea rovers. Captain Gunnarsson and his crew choose the latter and are forced to flee a place they once called home. Their luck seems to change when they sight a Spanish galleon separated from the treasure fleet by a storm, but during the pursuit their ship, Dream Chaser, is engulfed by a sudden, eerie mist. When they emerge they find themselves no longer in known territories, but in unknown and mysterious lands. Now they are struggling for their lives as they attempt to return to familiar waters with or without the Spanish treasure.