A dozen of renowned graffiti-artist vandals in France, who paint on subways, on the facades of buildings and along highways. Let's follow them in their daily lives and in their actions in order to understand why they are doing this. For adrenaline, to convey political messages, or for artistic research. Some very risky and very committed actions will be broadcast on French television, others will forever mark the streets of Paris. This 60-minute documentary is a year-long immersion in French graffiti.