Fleur has been reunited with the crew of the pirate ship the Black Dragon, and is especially happy to be home with her best friend Tom and her gruff uncle William the Heartless. They set sale for the Americas, a continent in the suspicious grip of the infamous witch trials at Salem. When Fleur discovers her mother - who she has long believed dead - is on trial for witchcraft, she mounts a daring rescue mission, which results in William being captured and transported to London to the Tyburn gallows. Fleur knows she must do everything in her power to save him, and captains the Black Dragon on its most treacherous journey yet. But dealing with rough waters and an ambush from the Royal Navy is nothing compared to the danger posed by her own mother Rose, the ultimate in unscrupulous pirate queens...