Eleven-year-old Friday Barnes discovers that her ultra exclusive boarding school is a hotbed of crime and soon she is investigating the disappearance of homework, stolen desserts, and a mysterious yeti haunting the school swamp.

Crime hits close to home when Friday Barnes learns her mother has been kidnapped. But her detective work gets put aside when Friday is distracted by other happenings at school: a new VIP student (a Norwegian princess!) has just arrived and a master thief called the Pimpernel is causing chaos across campus. Can super sleuth and girl genius Friday crack the case of her missing mother, reign in a royal brat, and unmask the elusive Pimpernel?