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.

Pollution, global warming, overpopulation. For Jean-Claude and Maddy there is only one solution: Leave Earth asking for help from aliens. But when a little green man lands to save them, things are not going to go as planned.

Summer 1990. Elsa and her father go to the South of France on vacation. They meet up with old friends and their four children in a house lost in the hills. Immediately, the complicity between adults and children is rekindled. But Elsa senses a growing tension and secretly worries.