Mathieu lives in Paris, Alice in a small seaside resort in Western France. He is a famous actor, about to turn fifty. She is a piano teacher in her forties. They were in love fifteen years ago, then separated. Time has passed. They each went their ways and slowly healed. When Mathieu goes try to overcome his melancholia in a thermal spa, he stumbles upon Alice.
A couple of fisher-folk are joined by a young new apprentice in the middle of a raging storm.
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.
