The moment of truth is approaching for Yasmine and Bilal. A last-minute clue proves their mother knew the truth about Mohamed's disappearance. If she kept silent, it was to protect her children from an incredible secret.

Return 25 years earlier, to the origins of the facts. Isabelle and Richard settle into their house, full of desire and ambition. But time passes and their unequal professional success creates an imbalance that is difficult to overcome.

Back to the present. Suddenly separated from her brother, Yasmine alerts the authorities. Constable Barthélémy leads the investigation in the basement of the house. But Isabelle opposes a version of the facts which incriminates their father, Mohamed.

20 years earlier, Richard's student was Mohamed. Frustrated at having to work in the factory while he dreams of becoming a writer, he regains hope thanks to Isabelle who wants to help him. But a resounding intrusion changes their meeting.

A few days earlier, Bilal and Yasmine keep watch at the bedside of their sick mother. She raves about their missing father, maybe alive. Only clue: he was last seen in a strange house in the middle of the woods.

An architect's house lost in the woods. One morning, Isabelle and Richard Deloye are sequestered in their home by a hooded and armed intruder. What does he want? Steal, rape, kill? Or anything else that the couple doesn't yet know...