In this book there are exciting detective adventures, undercover work, dangerous traps and mysterious crimes, as well as a story of true friendship that will teach readers to be kind and always help those in need. Penny Pepper, together with her detective friends, went to the fair in looking for a new case. But the girls didn't think that something terrible would happen to them. It started when Penny lost her wallet. And she wasn't the only one. Many visitors to the fair lost their wallets, watches and mobile phones. There was a real commotion, so the detective team must catch the pickpocket and return the stolen goods.