Georges (Auteil), a television talk show host, and his wife Anne (Binoche), are living the perfect life of modern comfort and security. One day, their idyll is disrupted in the form of a mysterious videotape that appears on their doorstep. On it they are being filmed by a hidden camera from across the street with no clues as to who shot it, or why. As more tapes arrive containing images that are disturbingly intimate and increasingly personal, Georges launches into an investigation of his own as to who is behind this. As he does so, secrets from his past are revealed, and the walls of security he and Anne have built around themselves begin to crumble.