Barnard realizes the settings in immersive detail, and she elicits some strikingly convincing performances from her cast; Conner Chapman, playing a boy with an untreated behavioral disorder, delivers one of the scariest performances I've seen from a child actor. The movie takes its title and narrative structure from a children's story by Oscar Wilde; as in the Dardenne brothers' The Kid With a Bike, the fairy-tale elements bolster the contemporary story with a sense of timelessness.