What is the French film The Hidden Camera about?

If someone is always spying on your life and your family, you will feel scared and angry; At the same time, there will be an internal audit: why did he (they) do this? Who did this? What have I done? This is a family of three. Her husband, George Roland, is the host of TV literature programs, his wife works in a publishing house, and his only son is in primary school. This is also a bookish "elite" intellectual family, "laughing and laughing with great scholars, having no contact with Ding Bai", and living an elegant and peaceful life. But recently, the family has been intimidated, and some people have been sending videos to the family. The video recorded the situation of family members coming in and out every day, and later attached a cartoon of vomiting blood. Such a prank caused the couple to panic. George Roland was afraid of her elderly mother's suffering and even went back to her hometown. In fact, everything is fine for the old man, but the mother told her son that a long time ago, she planned to adopt the son of a servant couple as an adopted son. This clue reveals a past event of a man's childhood: when he was a child, his mother kept slandering her and gave up adoption because of his strong opposition; The videotape was still delivered regularly, and the man fell into a panic, having nightmares and dreaming of his childhood partner: he killed the chicken at home, his face was covered with blood, and he came towards himself with an axe ... Gradually, the videotape seemed to provide clues and unveiled the mysterious veil. On the video, there is a place called Lenin Street, a building. As the camera went deeper and deeper in the corridor, George Roland finally found this place, and its owner was it. But George Roland did not hesitate to think that he was the initiator of the prank. He issued a warning, but this Maretheu was inexplicable and completely innocent. Then, one day, George Roland's child disappeared. After calling the police, the police arrested Maretheu and his son and released them for lack of evidence. Later, my son was sent back by others. It turned out to be just a false alarm; So the husband and wife also have differences on who is the video producer. The result is always unexpected. One day, George Roland was called home by Marit. After Marit said "I didn't make the video", he committed suicide, and blood spilled all over the wall and underground. The blood came so suddenly that Jeangeorges Roland was almost at a loss. My son didn't blame George Roland for his father's suicide, but he was obviously sad and wanted to negotiate with George Roland. George Roland, who was on guard, coldly refused. The sad son shouted to George Roland through the office door: You deprived my father of his right to education. Since kindergarten, he has learned nothing but hatred.