In the village of Tremolat, Périgord, the lonely headmistress Helene befriends the local butcher Popaul at the wedding party of her colleague, Leon Hamel. In spite of their friendship, they do not become lovers as Helene is still recovering from the disillusionment of her last relationship. On Popaul's birthday, Helene gives him a lighter as a gift. During the excursion with her class to a cave in the woods, Helene finds the latest victim of a serial killer that is stabbing young women in the area. She realizes that the woman is Leon's wife and she finds Popaul's lighter at the crime scene but she hides the evidence from the police. When Popaul visits her, she discovers that he still has the lighter and she feels relieved. However, when Popaul paints the ceiling of her house, she makes a discovery that affects her sense of security.
Source : IMDb