Effie Truelove and friends Lexy, Wolf, Maximilian and Raven must use their magical skills to defeat the Diberi, a corrupt organisation intent on destroying the worlds at Midwinter. But during a visit to the Otherworld, Effie is mistaken and imprisoned for being a galloglass - a dangerous, selfish islander.

Can Effie and her friends reunite before total destruction is wreaked upon the universe?