The five stories from this book all belong to the Kleo Series. The book is about the adventures of Katrin and her mouse Kleopatra.
Everywhere Kleo turns up she causes trouble: she smartly hid in Katrin`s bag to get to be a ballerina or to participate in a school trip. Even while flying to Mexiko she managed to get everyone in alert. But after all the trouble and the arguments they had, they stay best friends and experience many more adventures together.