Rowan Donchaad, captain of the Slayer of the Sea, has made killing leviathans not just his career but also his reason to live. The immense amount of gold he’s accumulated over the years slaying them and selling their parts has made him one of the wealthiest men in all the Isles of Manks. But even his love for gold is eclipsed when Rowan confronts a pair of monsters—one from the deep and one from his past—that threatens everything he loves.