Hi, I need help identifying a film in French, so I'm assuming it was made in France and not Canada. The general plot that I remember is that a man has an affair with a woman, he kills her and hides the body behind a wall in her appartment. He then goes back to get the body, but the walls have been replastered. So, when he gets the opportunity, he breaks open the plaster wall and the body is gone. After that I can't remember.
I'm guessing he film was released in the mid 80's.