When Kat accidentally tears open an old picture book, she discovers that she has entered the world of Cinderella - in the guise of Catriona, one of the terrible stepsisters. Her life is turned upside down as she is now a high-born lady and must learn to survive in high society, including figuring out how to walk through a door in a huge crinoline skirt. To get back, Kat must bring the fairy tale to a happy ending. But there are many problems: the other half-sister is simply incredibly beautiful, the fairy godmother has disappeared somewhere, and the prince, despite his unusual attractive appearance, sincerely does not like balls. Will she be able to return to the modern world again?