Shot from the point of view of hidden cameras, the film follows a thirty-something couple, James and Amy Deakin, as they are secretly videotaped 24/7 by a mysterious stalker in their home, on the streets, and at their workplace. The stalker uses information gleaned from the footage to subtly manipulate the unsuspecting couple, and cracks in their relationship surface. When Amy suddenly vanishes, James is not sure whether she has been abducted or has simply left him. As the acts of the tormentor become more twisted and violent, James desperately tries to figure out who is behind the terror in order to save his wife. But it seems the stalker is always one move ahead.