In every horror movie with a female protagonist where she’s running up the stairs from her killer rather than out of the front door, I scream at the screen in frustration and I’m irritated by the one-dimensionality of peril, panic and associated action. Freedom feels so clearly attainable, so often in these stories. Not here. Dean reminds us in stark detail of the true nature of physical and mental captivity which stops the thoughts of an easy escape dead in their tracks.