Bella Donna might be a young witch – but she still has to go to school in the real world. Bella is good at most of her lessons, but not all of them – and she’s really not very good at gym! But she knows her cat, Pegatha, would find it easy . . . 
When Bella finds a very simple spell for swapping bodies with Pegatha, she has a brilliant idea. But even simple spells can go wrong!