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...

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.

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.