One morning in a building on the outskirts of Paris, men and women of all ages begin to empty a large office. They threw dozens of files out the window. Among the people, Olivier Besancenot, the famous 35-year-old leader of the French radical left. He and his friends are getting rid of the archives which have been accumulating over the last forty years by their former organization. In a garbage truck, old cabinets, marxist books and campaign plans pile up. In the weeks to follow, all their hard work will turn their dreams into a reality: a new anti-capitalist party, wide and open, which is due to be born one year later to the day. The film follows this beginning, full of hopes and dark traps.