At the invitation of the Concertgebouw in Amsterdam, the Dutch conductor Jules Coulée returns to the Netherlands to conduct a one-off performance of Third Symphony by Gustav Mahler. Coulée is unpleasantly surprised when he sees that the Concertgebouw is under construction and that the renovations continue during rehearsals. In addition, the acoustics of the hall are terribly bad and the balcony too close, so that the post horn solo in the third movement cannot possibly come from afar, as the score prescribes. For Coulée, the entire implementation stands or falls with this detail.