Sarah is afraid of her dreams, which are slow camera moves endlessly forward through dark portals populated by slendermen (rendered in Cinema 4D), like the MST3K movie-sign tunnel as reimagined by the guy who makes the Tool videos. Sarah is Julia Sarah Stone, who has also starred with Evan Rachel Wood, and in a Bruce McDonald movie, and I heard mixed things about this movie but the look (of Sarah, her house, the dreams, the props) is all striking.
Sarah signs up for a sleep study in a concrete lab with period-inspecific equipment where scientists can view low-res images of dreams, and becomes their star pupil until they start to see her slendermen escaping into reality. She watches her own dreams in the form of a Chromatics music video, leads the scientists on a sleepwalking tour through Uncle Boonmee woods, becomes a vampire, then receives the message that This Is All A Dream. I get that the message might be aimed Matrix-like at either the viewer or the character, but haven’t decided if that’s any better.