As the inhabitants of the island of Mistmantle prepare for the coronation of Crispin the squirrel, robes are stitched, cakes are baked, wine is brought up from cellars, and the Heartstone-the unique gold-and-silver-flecked stone that only the rightful ruler of the island can hold-is readied. But the newly established peace in Mistmantle is soon under threat. Urchin finds himself journeying to a hostile island, where he will have to face challenges greater than those her has ever known . . . and he will learn a secret about his past that will change his life forever.