The story revolves around renowned orchestra conductor Thibaut. When he’s diagnosed with Leukaemia, he sets out in search of a compatible donor for a bone marrow transplant. He subsequently discovers that he’s adopted and that he has an older brother in the North. The latter is an office worker, but he also plays trombone in a local brass band which is soon to be dismantled. Against the backdrop of the closure of the only factory in the area, their meeting marks the beginning of a fraternal, social and musical adventure……