 Sophie, a quiet and shy maid working for the upper-class family Lelievre, hides her illiteracy under the cloak of a perfect household and obedience. She finds a friend in the energetic and uncompromising postmaster Jeanne, who encourages her to stand up against her bourgeois employers. Things start to escalate as the Lelievres find out that Sophie can t read and has brought Jeanne into their house against their wish.