Paranoid viewers may well catch the scent of some thing "off," the way folks with hyperosmia know the milk’s absent terrible before opening up the carton, but noticing the clues that Meyers, screenwriter Alan Trezza and the film’s primary solid-Alexandra Daddario, Maddie Hasson and Amy Forsyth-depart on the screen requires a minor deductive reasoning and a large amount of psychological examine.