On Christmas Eve, three young guys meet two gorgeous girls who invite them to spend the weekend in the country. They arrive and meet the maniacally grinning housekeeper Joseph (Vincent Cassel - Ocean's Twelve, Irreversible). That evening, what begins innocently as Christmas dinner turns into disturbing conversations about sex, satanic possession and evil. As the weekend progresses, Joseph's behavior only gets more erratic and the young friends realize their host has made a demonic pact. All hell is about to break loose.