French first-time feature director Alexandre Aja's blood-drenched, back-to-basics slasher film opens with a battered young woman in a hospital gown, muttering "I will never let anything come between us again" under her breath like a desperate mantra. The red light of a video camera interrupts her reverie: "Is it recording?" she asks, and plunges into the nightmarish events that brought her to her bare hospital room.
Needing to cram for exams, tomboyish Marie (Cecile de France) and hard-partying Alex (Maiwenn le Besco), college classmates and close friends, decide to study at the isolated farmhouse where Alex's parents live. There's nothing to do, nowhere to...