A group of holidaying friends decides to take a cable route, some sections of which are currently closed for maintenance. Although a couple of the friends protest, the group ventures off anyway. The problems soon begin when they have to cross a rickety bridge and the weakest member of the group starts to suffer from vertigo. The situation slips out of control when a mysterious presence begins to hunt down the group; isolated from the rest of the world, the friends are powerless against the traps and weapons of their hunter.