When petty thief Gilly, who lives with five younger brothers and sisters in a run-down boot, gets caught stealing, she is sentenced to three months at Fairy Tale Reform School, where all of the teachers are former villains, including the Big Bad Wolf, the Evil Queen, and Cinderella's Wicked Stepmother.

When Sleeping Beauty's nemesis breaks the Evil Queen out of the dungeon, Gilly and her friends at Fairy Tale Reform School must figure out how to stop Alva from terrorizing the village of Enchantasia--before she comes after the ones Gilly loves the most.