When Miriam (Léa Deluguet) divorced her husband Antoine Northon (Denes Menochet), she wanted her 12-year-old son Julien (Thomas Guiolia) to be away from his violent father, so she applied to the court for sole custody. However, Antoine successfully persuaded the judge in court, and the judge finally sentenced both parties to joint custody. Miriam, who was hit hard, not only had to accept the judgment that was not what she wanted, but also had to beware of her ex-husband's father who had ulterior motives. Faced with the irreconcilable parents, Julien, who was caught in the cracks, had to do everything he could to prevent the family crisis.