School inspections are no laughing matter, until one comes to Milton Court Primary School, where nine-year-old Max is a pupil. He unwittingly causes major problems for his recently appointed head teacher, Mrs. Pugh, who has aspirations of becoming an inspector in the near future. The obstacles Max puts in her way are never deliberate. He just happens to be in the wrong place at the wrong time all too often. His best friend in the world is his great-grandmother, commonly known to all as Granny, who becomes public enemy number one to Mrs. Pugh. Somehow, between them, Max and Granny succeed in thwarting all Mrs. Pugh’s plans for recognition, while only harbouring the best of intentions. When Mrs. Pugh receives a letter advising her of a forthcoming week-long school inspection, she sees it as the perfect opportunity to show the world her readiness to move on to greater things. But from day one, very little goes right.