Who stole the money that the old man in Holly Lane had so carefully hidden in his cottage, and where is it now? Why did his furniture disappear in the middle of the night? Fatty and the other Find-Outers have a long list of suspects, and a few clues, but this latest mystery just won't be solved! Mr. Goon, the policeman, is hot on the scent too, and he is sure that he has the answer when the others are still utterly confused. But who will solve the mystery first?