Prefect Imperfect

A smudge on a prefect badge leads Moon and his detecting sidekick to discover criminal activity in an unlikely quarter. It's a proud day for Moon's sister Hazel as she is sworn in as a junior prefect, but more importantly she is now able to make eyes at head boy – and school heart throb Nigel. For Moon a new investigation beckons as a mysterious note appears on his locker on which is written "stop them" with a prefect's badge pinned to it. Closer examination reveals clues which suggest some illicit activity linked to Pupil Enterprise Week – but what? Meanwhile Red's brother Herod is doing a surprising roaring trade on his cake stall, and the object of Hazel's affection, squeaky clean Nigel, has the finger of suspicion pointed at him over secrets from his past.