A teenage runaway takes part in a sleep study that becomes a nightmarish descent into the depths of her mind and a frightening examination of the power of dreams.
Despite an out-of-left-field ending, there's much to recommend about this night-terror horror story focused on a teen whose hyper-real nightmares intensify when she's being monitored during a sleep study. We're nearly lifted out of our seats by a couple of perfectly executed jump-scares. - Three stars