When an American family is invited to spend the weekend at the idyllic country estate of a charming British family they befriended on vacation, what begins as a dream holiday soon warps into a snarled psychological nightmare.

Five young people apply to live in an isolated house together for six months whilst their every move is filmed by numerous cameras.

A contemporary psychological thriller in which a young British couple travelling through the Australian outback become involved with a mysterious and charismatic American whose motive for imposing his friendship upon them becomes increasingly suspect and sinister.

Distraught, confused, and half-wild with fear, Sarah Carter emerges alone from the Appalachian cave system where she encountered unspeakable terrors. Unable to plausibly explain to the authorities what happened - or why she's covered in her friends' blood - Sarah is forced back to the subterranean depths to help locate her five missing companions.

2008 film by James Watkins