A new school is about to open in a “residence” under construction. It will be “green” and in the image of the new inhabitants who will arrive. Opposite her, the Jacques Prévert school, aged and scattered at the foot of the building’s bars, can’t make it. Parents are already wondering how to change their children’s school. The director, Zahia, played by Rachida Brakni, is desperate. How to avoid losses? To preserve the fragile social mix of her school? The answer will come from an incisive young teacher, Marion. An ecological school? Flea. It remains to convince the team.