Under the Sun of Satan (Maurice Pialat,1987)

 Dossignan is a zealous rural priest. The dean Menou-Segrais tries to keep him reasonable. But Dossignan will be tempted by Satan, then will try to save the soul of Mouchette, a young girl who killed one of her lovers. 

https://mega.nz/#F!ntBh1AgJ!DeHpzxn3qga3HtcpF2aL4g