France, beginning of the 70's. Lucie, a ten year old little girl, kidnapped a few months earlier, is found wandering on the road. Her abused body does not carry any trace of sexual assault. The reasons of her disappearance remain mysterious. Traumatised and mute, she is placed in a hospital where she finds friendship with Anna, a girl her age. 15 years later. She knocks on the door of an ordinary family. The father opens and finds himself face to face with Lucie, armed with a shotgun. Having found her torturers, she shoots.