Music is the story of a father and son. Or, rather, the story of the reunion between a father and son who have hardly seen each other over many years and who clumsily attempt to renew bonds. Unfortunately, too much time has already passed and it will be impossible to strengthen the ties. But although they lose each other again, the father will nevertheless pass on a legacy to his son: the love of music.

Ludovic, a successful forty-something architect, begins a romance with Nathalie, the mother of two young girls, Laëtitia and Luna. As their budding love grows, Ludovic feels increasingly close to them. But when Nathalie decides to distance herself from him, he starts to lose his grip. Thus begins a long downward spiral.

Fouad, a young Arab man, finds himself at a dinner party for young people in their thirties in Brussels. Everything is going well until they realize that a backpack has disappeared...

Two adults go to their middle school reunion in order to show off their success to old bullies teenage crushes.