瓢泼雨夜,Thomas开车送临盆的妻子去医院,撞死了年轻人Sebastien,后者的母亲Marie-France无法接受事实。9年后,她成为Thomas的临时秘书,而他却不明她的身份。她搬到他家对面的公寓,逐渐侵入他的生活,成为他的继母。而她的目的是把Thomas的儿子当自己的死去的儿子,不惜清除一个个障碍。Thomas发现了真相,最终能挽救儿子吗?As he is driving his wife to the maternity ward, Thomas runs over and kills a young man on the road. Marie-France, the mother, will not get over the mourning of her lost son. Nine years ...