Ariane and Pierre raise their son Camille with the help of their devoted housekeeper Hélène. The boy is endlessly drawn to a video camera he keeps close at hand and often speaks of a friend he meets, named Alexandre. On Camille’s birthday, the family sits down to dinner and the child asks whether Ariane was present at his birth. She answers yes and softly recounts tiny, specific details of that moment to reassure him, a quiet scene that foreshadows how memory and truth will begin to blur.
Soon after, [Pierre] leaves on business and is largely absent for the rest of the story, speaking only in fleeting phone calls with Ariane. In his absence, Ariane seeks support from her brother Serge, a psychiatrist who becomes entangled in Camille’s increasingly unstable feelings. After an afternoon spent in the park with [Hélène], Camille becomes persistent about wanting to be taken to his “true home.” Confused and distressed, Ariane asks Hélène to weigh in, and the housekeeper contends that everything was normal until Ariane herself arrived.
Ariane decides to take Camille to the place he claims is his real home. They meet the caretaker Laurence, who opens the door and greets them as if they were familiar, even though Ariane and Camille should not be there. Inside, Camille rushes into a bedroom filled with pictures of a young boy; Laurence reveals, with a quiet clarity that both Ariane and Camille already sense, that the boy on the wall was Isabelle’s son Paul who drowned years ago. Ariane tries to leave, but Camille refuses to go back, and the two return to their own home.
Back at their house, Camille begins referring to Ariane by her name rather than calling her “mummy,” a shift that alarms Ariane and Serge, who decide not to press the issue too hard. The next day, Ariane takes Camille to the home of Isabelle, who appears to bond with her son and to recognize Camille as someone she believes could be her own child, while Camille repeats that his true mother is Isabelle. Isabelle’s tender insistence pushes Ariane to step back, and Camille declares that his real name is Paul; the legal and emotional implications of this declaration ripple through the household. Ariane agrees to allow Camille to stay with Isabelle for a night, fearful of losing him.
The next morning, Camille, Isabelle, and Ariane return to Ariane’s house, but the dynamic shifts: Camille продолжает calling Isabelle “mummy” while Ariane is addressed by her given name. Serge intervenes, urging Camille to acknowledge that his true name is Camille and that Ariane is his mother. Camille resists, and a tense chase ensues, with Ariane’s fear turning into determination not to let Isabelle claim him. In a moment of mounting conflict, Ariane pleads with Isabelle to move into their large home, a request Isabelle accepts with a quiet, almost hopeful resolve.
But the peace is brief. The next day, Isabelle is summoned downstairs, and Camille is whisked away by Serge’s secretary to a car that will take him to a hospital—only to arrive at a mental institution. Isabelle protests, and Serge calmly states that she can leave only if she is admitted for tests. Meanwhile, at home, Ariane receives news that Camille has been dropped off but she cannot locate him. She eventually finds him in the garden, where he accuses her of lying. Ariane reports the troubling dialogue to Serge, who notes that Camille’s story has taken another turn.
Camille then vanishes again, and a strange boy named Alexandre appears in Ariane’s house. He explains that something is terribly wrong, recounts Camille’s habit of meeting him for their regular meetings, and reveals that Camille has been haunted by a ghost named Paul. Alexandre hands Ariane the possessions Camille had asked him to pass on if he ever needed help and then slips away through the window Camille used to escape.
Isabelle discovers the cassette tapes Camille recorded on his camera and watches them with Hélène. The tapes show Isabelle attempting to convince Camille that his real name is Paul and that he is indeed her son. The footage places them on the canal where Isabelle’s son once drowned, and Isabelle seems to instill in Camille the sense that he belongs with her. Ariane, seeing the tapes, grows increasingly convinced that Camille’s claims point to a hidden truth, while Hélène maintains that she has never abandoned Camille.
Ariane’s realization deepens when she sees Camille’s name on the tapes, and she understands that Camille is on a barge on the canal near the site of Paul’s drowning. Serge drives to the barge to reclaim Camille, arriving just as Isabelle is about to depart with him by taxi. It becomes clear in this tense moment that Camille now wants to return to his “real” mother.
The film closes with a symbol-strewn image: a painting titled The Judgement of Solomon hangs in Ariane’s dining room, and a recent impact has damaged it. Earlier, Ariane had explained she moved the painting to a position where Isabelle could see it, and its cracked surface serves as a quiet, aching reminder of the competing claims over Camille’s loyalty and affection. Pierre phones to say he’s coming home, and Ariane tells him that everything has been quiet in his absence, though she notes that a mutual friend has died and Camille has grown anxious. He returns, she says, because a child needs a father—and because the truth about Camille’s origins has finally reached a point where every answer comes with a new question.
