Polly the Warrior-Cat has finally broken one rule too many. After her wild adventures with Hilo land her in massive trouble yet again, she is packed up and sent away to the Wombatton Academy of Better Magic. It is a strict magical boarding school specifically designed for bad kids and very bad cats. Polly expects her new school to be incredibly boring, but she quickly realizes that something highly suspicious is happening in the shadowy halls of Wombatton. Without warning, students are mysteriously disappearing into thin air, and nobody seems to know why. Even though she is far from home, Polly knows she cannot just sit back and let this happen. Now, she must sharpen her claws and use all her warrior skills to get to the bottom of this bizarre magical mystery. Can Polly uncover the truth behind the vanishing students, plan a daring escape from boarding school, and find her way back to Earth to reunite with her best friends?