 Louise, younger sister, natural and straightforward, lives in province; Martine, older sister, beautiful and aloof, lives in the Parisian upper middle class. Louise has written a novel. On Monday she will go for an appointment with a publisher in Paris, which may change her life. She comes to live with Martine for three days. During three days, Louise and her obvious happiness exasperate Martine and set her life in glares.....