The main character of this film is the renowned conductor Thibaut, who discovers that he has leukaemia. To be cured, he urgently needs a voluntary bone marrow donor. While searching for a solution to his situation, he first learns that he was adopted as a child and eventually finds his older brother, who, by coincidence, is also a musician. His brother is a member of a local orchestra, even though he works in a factory. Their meeting and reunion, set against the backdrop of the factory’s closure, spark an unexpected brotherly musical journey, accompanied throughout the film by the music of Charles Aznavour.