La Grotte aux loups (1980)

"La Grotte aux loups" is a 1980 Crime movie directed by Bernard Toublanc-Michel and starring by Claude Jade, Alain Claessens. A postman in a small mountain village finds a woman and her son both dead in the "grotte aux loups" (cave of wolves). He soon begins to realize than it's not natural death, and that someone in the village in behind their murder, while tragic events occur.