Here is a single-location mystery thriller from first-time feature screenwriter Christie LeBlanc which is more than a bit on the preposterous side. It requires some hefty levels of disbelief suspension and plausibility buy-in. But the excellent Mélanie Laurent (from Quentin Tarantino’s Inglourious Basterds) sells it hard, and it’s a rather elegant contrivance, more restrained than usual from this director, the shlock-horror specialist Alexandre...