Sabrina and Daphne learn that their grandmother is the headmistress of the Grimm Academy of Accelerated Learning. The academy is no ordinary school but rather a place where kids are trained to solve cases involving fairy tale creatures. Despite Daphne's initial skepticism, the sisters soon discover that they have special abilities and quickly excel as fairy-tale detectives.
As Sabrina and Daphne delves into their first case, they stumble upon a series of sinister events related to the disappearance of children. They uncover that their parents' disappearance and the missing children may be connected. Their journey takes them to magical realms, dark, treacherous forests, and challenging encounters with legendary creatures. Along the way, the sisters encounter Cinderella, Pinocchio, and many more classic characters from fairy tales.
The story also introduces Mister Canis, the vice principal of the academy and a guardian who helps the girls in their detective work. Together, they face daunting challenges and race against time to rescue their parents and uncover the hidden truths behind the town.
Throughout the book, Sabrina and Daphne showcase their resourcefulness, friendship, and determination. They rely on their unique skills and bond with fairy tale creatures to solve mysteries, ultimately becoming fairy-tale detectives capable of handling any challenge that lies ahead.