Sean Durkin’s haunting first feature, about a young woman’s halting attempts to undo the psychic terror of the cult she’s just escaped, heralds the arrival of a remarkable new talent. Fleeing a Manson-like Catskills compound at dawn, Martha (Elizabeth Olsen, leading an excellent cast) reconnects with her older sister, Lucy (Sarah Paulson), a bourgeois New Yorker who takes in her sibling at the Connecticut country house she shares with her husband, Ted (Hugh Dancy). Lucy remains unaware of exactly what happened to Martha over the past few years—details that Durkin slowly but powerfully unveils in uncanny, disorienting flashbacks. The film’s gorgeous, painterly compositions have the chilling effect of suggesting that even our worst nightmares still retain a seductive allure. A Fox Searchlight release.