Ship-Thief, noun. A stealer of ships, and a threat to any honest crew; a troublemaker; a lawbreaker; a man, perhaps, such as Vincent...The Unicorn ship is home to Zannah and Gideon - at least, the only home they have ever known. So when the crew are left stranded on the Aleutian islands, their ship stolen, the twins decide there is nothing or no one that will stop them getting their ship back!