Helene Regnier's husband Charles, who is mentally ill, injures their son Michel in a rage. Charles moves back in with his wealthy and manipulative parents, who blame Helene for their son's condition and vow to win custody of Michel. While the boy is in hospital, Helene rents a room in a boarding house nearby. The Regniers hire Paul Thomas, a family acquaintance who needs money, to find dirt on Helene before the court hearing on custody. Paul moves into the boarding house and, with the help of his girlfriend Sonia, who rarely wears clothes, plots to ruin Helene's reputation and then her very life.

在法国的一个乡镇，参军15年归来的屠夫保罗与小学校长爱莲娜在一场婚礼上相遇了，他们很快熟络起来。在他们周围笼罩着不知是浪漫的还是危险的气息，他们的感情似乎在升温，镇上却一直传来女孩惨死的消息。保罗追求爱莲娜，但爱莲娜始终言辞闪烁，却也接受来自保罗的好意，直到爱莲娜在一具女尸旁找到她送给保罗的打火机...