When Chip’s brand new model aeroplane goes missing, he and Wilf must become detectives to track down the dastardly person who took it. But as they put each culprit under the spotlight, they soon find that Biff, Anneena, Mum and Dad all have very good alibis with watertight explanations why they couldn’t have stolen the aeroplane. Will the dogged detectives ever track down the missing model? And was the thief a snow monster who smelled of strawberries?