Virginie Thévenot, a somewhat special math teacher, takes advantage of a general strike in a college to try an extraordinary experiment with a small group of students. She takes a bet: let them do what they want... A spark that will ignite the spirits of teenagers, cause a small revolution within the college, and turn their lives upside down.

Because he forgot his identity card, Elias cannot take the entrance exam to Sciences Po. In search of a job while waiting to be able to take the exam again, he becomes an educator in a children's home. Confronted with an environment he doesn't know how to work, Elias doesn't yet know how much this experience will change his life.