At Léon Blum High School in Créteil, France, a history teacher decides to have her weakest 10th grade class participate in a national history competition.

Zahia Ziouani, 17, dreams of becoming a conductor, while her twin sister Fettouma hopes to be a professional cellist. They want to make classical music accessible to everyone and create their own orchestra.

Algiers, a few years after the civil war. Amal and Samir have decided to celebrate their twentieth wedding anniversary in a restaurant. While on their way, their share their views on Algeria: Amal talks about lost illusions and Samir about the necessity to cope with them. At the same time, their son Fahim and his friends Feriel and Reda are wandering about in a hostile Algiers about to steal their youth.

Vincent, 18 years old, is dumped by Elina. It is his first love, it is the end of the world! His parents decide to take matters into their own hands and will try everything to make him forget this girl: he will have to follow them in a loving detoxification of which they will imagine the program ...