Having returned one day from a masquerade ball, the Count de Gruyere, one of the most remarkable inhabitants of the Mouse Kingdom, found his house sealed and the city around him almost unrecognizable. A lot of time passed before he realized that in some incomprehensible way he had found himself in the past: someone’s unknown will had transported him to the time of Maus XIII, where, due to a strong family resemblance, he was mistaken for his ancestor, a close friend of the disgraced queen. Don't be fooled by the title and setting of the book: this book was written for adults. Drawings by the author were used to design the cover.