Summer 1998. Countryside. Cassandre is 14. Her parents and older brother notice that her body has changed.

In a quiet fishing village on northern France's Opal Coast, the birth of a peculiar child sparks a hidden war between extraterrestrial forces of good and evil.

The story of Maxime, a 33-year-old musician, who has come to find refuge in his father’s home in the town of Tonnerre. There he will have the joy and the bad luck of meeting Mélodie, a 21-year-old girl trapped by her love for her childhood sweetheart. One and the other will not experience the same story at the same time, which will trigger a series of incidents.

Yves is a constant victim of humiliation on the part of his schoolmates. His only refuge is synchronized swimming, which he practices at night in secret. When Charlotte, a colleague and team member, finds out, he can no longer hide.

Marked by years of prison, Djo, a parcel delivery man in the Paris suburbs, lives modestly with his mother and daughter. One day, an aunt who has just fled the Ivorian conflict arrives at their home with her three children. In a hurry, Djo manages to find them a place to live. But faced with the growing demand and with the prospect of offering a decent life to his daughter, Djo switches and becomes a sleep merchant.

Thirtysomething Marco goes through life without a compass. Employed at a Forbach recycling center, he finds comfort in alcohol. And a little with Madeleine, a mature woman with whom he secretly has a relationship. One day, he is drawn by lot to be a juror of Assisi. Incapable of discernment for himself, Marco will have to decide the life of a young arsonist accused of manslaughter.

Even though they don’t know each other very much, Inès (14) and Abdel (15) decide to have their first time together. The big day arrives and Inès is called to help out a neighbor to babysit her two kids Moussa (3) and Balla (5). Inès is determined to go through with their plan and asks Abdel to join her at her neighbor’s apartment. But the two children and their friends don’t stop to interrupt them in their pursuit. And so, they are forced to get to know each other in a different way.