Orphans Sabrina and Daphne Grimm are sent to live with an eccentric grandmother that they have always believed to be dead.

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.

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.