Although filled with anger over her parents' disappearance, eleven-year-old Sabrina Grimm--along with her grandmother, sister, and several fairy-tale characters--tries to discover who has killed her teacher.

When the fairy-tale detectives rush to New York City hoping to find an Everafter who can cure Puck, they trigger a chain of events that includes a murder mystery, and learn many new things about their mother who, along with their father, is still in an enchanted sleep.

When a kangaroo court of Everafters, led by Judge Mad Hatter, tries Mr. Canis for his past crimes as the Big Bad Wolf, the Grimms seek evidence to save their friend, although Sabrina questions whether he should be saved.

As the fairytale detectives race through the Book of Everafter searching for their baby brother, they encounter various characters including the Editor and his army of Revisers, who threaten the children with dire consequences if they continue to change the stories.