Watch VoirFilms. Trapped in an abusive marriage, a wealthy German prince desperately seeks a way out. But what appears to be the road to salvation soon turns into a highway to hell. The universal language of music meets the international language of Esperanto in this debut opera by Ivan Acher. The carpenter, forest worker, designer and composer has cleverly blended electro-acoustic and contemporary music to breathe life into Ladislav Klíma’s expressionist novel, The Sufferings of Prince Sternenhoch.