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…