Les amants naufragés (2010)

Too much in love, overly possessive, there's no doubt in Stan Mirkine's mind: his wife is cheating on him. Mathilde is unfaithful. And Stan's suspicions cast him into a hellish spiral of jealousy until the inevitable occurs: Stan kills his rival. But what if Stan had been misled by his paranoia... Or even by a frame-up? If so, who is pulling the strings?