When Jack and Sarah are called in to investigate mysterious pranks at an exclusive girls' private school, it seems at first that it might be the work of a few mean pupils with a grudge. But things quickly turn serious when a popular teacher meets a sudden, violent death. Now, with murder in the air, Jack and Sarah have their own lessons to learn about the Cherringham Girls School, its dark secrets... and who wanted that teacher dead before they learned the truth.

---

Personen: Costello, Matthew