A single mother is plagued by the violent death of her husband and battles with her son’s night time fear of a shadowy monster. But soon, the story shifts from one of a mother driven nearly mad by her son’s obsessions to one of a woman possessed and nearly destroyed by loss. Pitched somewhere between a Roald Dahl yarn and Roman Polanski’s Repulsion, the film has received an explosion of acclaim following its world premiere at Sundance 2014.