Twelve-year-old Anaos is fat. Her sister, fifteen-year-old Elena, is a beauty. While the girls are on vacation with their parents, Anaos tags along while Elena explores the dreary seaside town. Elena meets Fernando, an Italian law student; he seduces her with promises of love, and the ever watchful Anaos bears witness to the corruption of her sisters innocence. FAT GIRL (A MA SOEUR!) is not only a portrayal of female adolescent sexuality and the complicated bond between siblings but also a shocking assertion by the always controversial Catherine Breillat (ROMANCE, THE LAST MISTRESS) that violent oppression exists at the core of male-female relations.