«The bomb worked properly; on that point, he has every reason to be satisfied. The survivors are already trying to help the victims left on the ground. Jean plunges into the subway. He is not going to rescue anyone. He is the bomber.» Jean Garnier has nothing left to lose in life: his mother is in prison, his girlfriend has been killed, and he has no job. Faced with this lost young man, Camille Verhœven must act with more subtlety than ever; is Jean a real threat to the whole country, or just a loser suffering from delusions of grandeur?