Driving to a music festival, Tom (Iain De Caestecker) and Lucy (Alice Englert) have plans to stay at a remote countryside hotel. But when signs lead them in circles they are soon trapped in a maze of back-roads, with only their vehicle for protection from an unseen tormentor hell-bent on exploiting their worst nightmares. Driving, lost and tormented in the night, primal fears of the dark and unknown become real, as the couple realise they may have let the evil in, or that it was always there.