In 1987, Massachusetts, five friends invade a haunted house under the cover of night. From the moment they enter, things go horribly wrong.
A Shadow lurks in the darkness, and the front door disappears, leaving them trapped. Hunted by the Shadow, they flee through the one-roomed house that somehow changes and reshapes itself, forcing them into new rooms and corridors that don’t exist.
When the first friend is marked by the Shadow, they realize they may not make it out alive.
Can they band together and find a way out? Will someone have to make the ultimate sacrifice?