Buried deep in rural France, little remains of the isolated hamlet of the Three Lone Girls, save a few houses and a curiously assembled quartet: Patrice Bergogne, inheritor of his family's farm; his wife, Marion; their daughter, Ida; and their neighbor, Christine, an artist. While Patrice plans a surprise for his wife's fortieth birthday, inexplicable events start to disrupt the hamlet's quiet existence: anonymous, menacing letters, an unfamiliar car rolling up the driveway. And as night falls, strangers stalk the houses, unleashing a nightmarish chain of events.