This new horror movie filmed entirely on an iPhone camera will have you questioning your sanity

Who can you trust when you can't trust yourself?

Oscar-winning director Steven Soderbergh (Ocean's 11, Magic Mike, Traffic, Erin Brokovitch) is going full Hitchcockian psychological horror with his new movie, but being Soderbergh, he is also pushing the technological envelope, by filming the entire movie using nothing but an iPhone camera. Unsane tells the story of Sawyer (The Crown's Claire Foy), a woman who has had to start her life from scratch in a new city after a former lover goes full stalker on her. Still traumatised by how that relationship ended, her mind is prone to playing tricks on her, and she sometimes sees the stalker in places her obviously couldn't be. When she goes to a therapist to talk about her problems, she fills out a few forms, and before she knows it, she is told that she has voluntarily signed herself up for a stay in a nearby institution until she is deemed fit and well enough to no longer be a harm to herself or others. Convinced that there has to have been some kind of mistake, Sawyer attempts to get out of the institution, but the visions of her stalker are getting stronger, to the point that she's not entirely sure he isn't actually in the institution with her, or that she isn't actually losing her mind... Foy is joined on screen by Juno Temple (The Dark Knight Rises, Killer Joe), Jay Pharaoh (Saturday Night Live, Ride Along) and Joshua Leonard (Josh from The Blair Witch Project), and if this movie is a success, we could be looking at one of the smallest budgets ever turning over a massive box office profit. Unsane hits Irish cinemas on Friday 23 March. Clip via 20th Century Fox UK