Jean Garnier, a lonely loser has lost everything, including his mother who has been imprisoned. To scream his despair to the world, Jean sets up seven bombs hidden all over Paris. After the first one detonates, he gives himself up to the police. Jean has one simple request: his mother's liberation or the daily explosions will continue. Inspector Camille Verhoeven must decipher who's really hidden behind the quiet young man, as the clock ticks on to hundreds of potential new victims.