Rosemary has the mumps, and can't go to her cousin's birthday party. Her brothers tease her by calling her 'Mumpy', before heading off to the party. Rosemary sits in the garden with her books, and then something strange happens. Three kittens who have lost their mittens appear. Soon, Rosemary realises that she is no longer in her garden, but is actually in the land of nursery rhymes.
