The Krautrock band Lokomotive Kreuzberg set itself the goal of combining music with trade union activism. From 1972 to 1977, it toured Germany with cabaret and songs such as ‘Solidaritätslied’ (The Solidarity Song) ‘Lohnpredigt’ (Wages Sermon) or ‘Geldsack’ (Moneybags). The film shows recordings of rehearsals, performances, and political discussions with the audience. The musicians describe their careers from classical music training to political rock.