Marielle the mouse has worked her dressmaking magic for nine days and nine nights to create nine beautiful dresses for Madame Sooree's nine daughters. Finished at last, Marielle goes to bed, but when she wakes up, the dresses are gone! With no time to lose, Marielle must overcome her fear of heights to take a wild ride with her friend Pierre the pigeon to recover the missing party dresses, which have been scattered across Paris.