The film begins with an extensive and captivating static shot of a lavish residential street in Paris, gently pulling viewers into the unfolding mystery. It soon becomes evident that this seemingly innocuous scene is actually a recording displayed on a television set. An upscale Parisian family unexpectedly discovers this enigmatic videotape left at their doorstep, leading to a series of unsettling events. The tape captures hours of footage showing the exterior of their home, yet the origin and purpose of this recording remain shrouded in secrecy, leaving the family puzzled and anxious.
At the center of this unsettling narrative is Georges Laurent, portrayed by Daniel Auteuil, a prominent television presenter known for his literary program that boasts a large and devoted audience. He is married to Anne played by Juliette Binoche, and together they share a son named Pierrot, portrayed by Lester Makedonsky. The couple finds themselves increasingly anxious about the sinister implications of the videotape, grappling with the possibility that it may have originated from their son, one of his friends, or even a zealous fan of Georges.
As the story unfolds, a second tape arrives the following day, deepening the family's unease. Much like the first, this tape features a nighttime recording of their home, but this time, it is accompanied by a disturbing image—a childlike drawing of a boy with blood trickling from his mouth. Seeking guidance, Georges and Anne approach the police, only to be met with indifference; the authorities inform them that, in the absence of a direct threat, they have little recourse. Frustrated and alarmed, the couple navigates the tension that arises, only to find their normal life disrupted.
As the tension escalates during a dinner with friends, Georges steps outside to investigate a doorbell ring, only to find an empty street. In a moment of anger, he shouts into the darkness, "Show up, you coward." This confrontation leads to further revelations when a new tape emerges, showing someone driving through a rain-soaked countryside toward a long-abandoned manor house, which Georges recognizes as his childhood home. Upon visiting, he discovers his frail mother, played by Annie Girardot, and learns about a boy named Majid, whom his family nearly adopted when Georges was a child.
Haunted by nightmares linked to the past, Georges's world continues to spiral as he tries to piece together the growing mystery. The plot takes a darker turn when another tape reveals footage from outside a low-income housing apartment and culminates in a vehement argument between Georges and Anne over trust and secrecy. This opens the door to the confrontation with Majid, now a troubled man, who Georges believes may be behind the harrowing tapes. The emotional weight of Georges's past, intertwined with his childhood lies, serves as a catalyst for the events that unfold.
The relationship between Georges and Majid intensifies, unveiling the traumatic layers of Georges's childhood behavior that led to Majid's tragic fate. As the Laurent family grapples with their escalating fears—the mysterious disappearance of Pierrot pushes them further into despair—Georges's confrontation with Majid culminates in a shocking moment when Majid takes his own life, leaving Georges to wrestle with the gravity of his actions and their consequences.
In the aftermath of this tragedy, Georges finds himself spiraling deeper into his conscience, haunted by memories of lies he told to prevent Majid's adoption and the subsequent impact it had on Majid's life. The emotional fallout is palpable as Anne demands the truth, pushing Georges to confront the ghosts of his childhood—a burden he had long buried.
As the threads of the story intertwine, the film closes on a poignant scene that highlights the innocence of youth despite the complexities of their families' histories. The unspoken connection between Pierrot and Majid's son hints at a fragile hope that, in the cycle of secrets and pain, perhaps understanding and empathy can emerge. The final shot lingers on the boys, capturing a moment of quiet camaraderie, suggesting that the passage of time may offer a chance for healing amidst the scars left by the past.
