Valentin D is a hot designer architect who claims to be an orphan because he is too ashamed to admit he is the son of working-class scrap metal merchants from the north of France.

Monday morning. Paul Wertret, 50, heads off to his job as a manager at the International Credit and Trade Bank. He arrives at 8 o’clock on the dot, as usual. He enters a meeting room, takes out a gun and kills two of his bosses. Then he locks himself in his office. As he waits for the inevitable police assault, this ordinary man looks back over his life and the events that led him to commit such an act.