A group of five strangers, lured to a secluded lodge via a creepy invitation to participate in a covert documentary film project, contract to remain on-site for the duration of the filming. The strangers soon discover the sinister intentions of the unseen filmmaker as they are subjected to a terrifying nightmare of deception, violence, and murder. As they fight to survive, they begin to suspect that the killer might not be working alone, and that there may be a camera observing their every move, harboring another deadly secret.