From visionary director Alexandre Aja (CRAWL) and the creative minds behind Stranger Things comes this psychological horror-thriller. As an evil takes over the world beyond their front doorstep; a mother (Oscar winner Halle Berry) and her twin sons find their only protection is their house and their deep-rooted family bond. Needing to stay connected at all times even tethering themselves with ropes they urge each other to never let go. But when one of the boys questions if the evil is real; the ties that bind them together are severed; triggering a terrifying fight for survival.