卡尔海因兹·斯托克豪森（Karlheinz Stockhausen）- 二十世纪最伟大的前卫作曲家，2007年12月初在德国家中逝世，终年79岁。此片为纪念斯托克豪森，影片拍摄的是他60年代创作的首部实验音乐剧《原型》的美国首映现场（1964年）以及30年后在纽约第二届先锋艺术节上的再次公演。斯托克豪森的《原型》混合了戏剧、音乐、演讲、行为艺术、舞台模特秀等各种艺术形式，并让观众亲身参加表演，是60年代欧洲最重要的前卫音乐剧之一。

This film is a documentary about the preparation of the amazing Helicopter String Quartet which Stockhausen brought to fruition simply because he had experienced it in a dream. The composer presents the music in a very accessible way, documenting the events that led to news headlines around the world in 1995. The musicians are seen rehearsing separately, and then in the helicopters themselves as they soar over Amsterdam transmitting their music down to the concert hall. If only the film included a complete performance such as the one thousands will experience when the event is recreated in the skies of Bonn in May 2000.