Nothing is ever easy. Just when Trent thought things were going well, an old debt of Ciaran's has reared its head. To settle it, the pair are forced to travel to Lochlann, a mystical forgotten island supposedly populated by a warlike and secretive race with a history with the Tuatha Dé Danann. With Noah and Julien along, the witch determined to keep his promise to his new friends, the group will face storms, monsters, political intrigue, and a greater enemy than any of them could have anticipated.