Enough time has passed since the Tepez family moved for the sisters to get used to their new life: no more night school, mom established seven strict rules... But Sylvania and Ducky have a real best friend! And, of course, new adventures await them. A large exhibition of Japanese art from the Edo era opens in the town of Bindenburg. The main and most valuable exhibit is the fan. Ludo, Ducky and Sylvania's classmate, warns them not to visit the exhibit. But why? What is so dangerous hidden in the art of the Land of the Rising Sun? And the sisters need to share their secret with Helena. After all, they are best friends...