In Stephanie Daley, a 16-year-old Christian girl, played with exploratory shy grace by Amber Tamblyn, is accused of murdering her newborn infant. But did she even know that she was pregnant? That's what Tilda Swinton, as a forensic psychologist who is about to have a baby herself, must determine. Shot in a pinpoint, suggestive handheld style, this lacerating drama from writer-director Hilary Brougher shines a piercing light onto some of the hidden terrors of women, especially in an era when abstinence can shade into ignorance. The scary culminating flashback, in which Stephanie gives birth in a public restroom, on a high school ski trip is a marvel of authentic disturbance.