Aedan Calahan, 15, is a dirty, rotten Dublin thief who steals to provide for his sick mum. Between helping his sick mum and starting a new, honorable life, there's nothing Alan longs for more. After a near-death experience with a demon, Aedan is given a way out by a Druid named Maggie. If he agrees to attend a school for Druids in the Otherworld, he will both be kept safe from the demon and his mom will be provided for. It's a dream come true. At the Keeper's Grotto where he attends school, Aedan enjoys a new life, full of food, friendship, and fun. When the demon returns as his possessed mother, Aedan is forced to travel to the Isle of Skye to save her. With the help of his friends, Aedan proves to the world and himself who he truly is: the recycled soul of King Nuada of the Silver Hand, the greatest of the Druid kings.