Hungry for their first proper detecting case, Fletcher Moon and Red are on the trail of a mobile phone thief at St Jerome's who seems determined to drive the school to complete anarchy.
A swimming trial is sabotaged, a betting ring busted, and pint-sized private eye, Fletcher Moon is forced to conquer his fear of water.
A smudge on a prefect badge leads Moon and his detecting sidekick to expose criminal activity in an unlikely quarter.
What appears to be the ghost of evil old Mr. Pickles is spotted in the creepy disused school science lab but is all what it seems? Can Moon and Red solve this paranormal mystery?