Effie Truelove and her school friends Lexy, Wolf, Maximilian, and Raven must put their magical skills to the test. The Diberi, a corrupt organization intent on destroying the world, has returned and has something sinister planned at Midwinter. But during a visit to the Otherworld, Effie is mistaken and imprisoned for being a galloglass-a dangerous, selfish islander. Meanwhile, Lexy is threatened by the vile professor Jupiter Peacock and Wolf embarks...