This series follows 12-year-old investigator Fletcher Moon (Rory Elrick), a.k.a Half Moon and his crime-busting partner Red Sharkey (Sebastian Charles) as they fearlessly fight crime and playground thugs. The schoolyard can be a dirty place with missing pencil cases, counterfeit homework and stolen trading cards but Half Moon's stakeouts and undercover operations aims to restore order for the pupils of St Jerome's school.