One April night, the sky of Peterswood is lit up by the brightness of a cottage on fire. Fatty, Larry, Daisy, Bets, Pip, and Buster the dog, set about trying to solve this exciting mystery of who burnt down Mr Hicks' cottage workshop in his garden. They make lists of suspects they want to interview and try and find as many clues as they can, whilst trying to avoid the wrath of the village policeman, Mr Goon, who the children nickname 'old Clear Orf.' Will they manage to solve the Mystery of the Burnt Cottage before Mr Goon does?