本片是罗勃雷纳自导自演之作，片中刻意杜撰出一个英国摇滚乐团Spinal Tap，罗勃雷纳则饰演要为该乐团拍摄纪录片的电影导演马蒂。本片虽然看似纪录片，实则是一部对当代摇滚乐做出尖锐嘲讽的高水准喜剧，导演成功地将一个虚构的乐团台上台下表里不一的嘴脸，以仿纪录片的形式呈现在观众面前。本片还创下一件空前记录片中虚构的Spinal Tap乐团后来在90年代，竟然还找回当时演出的乐团团员，当真举办了几场极成功的演唱会，此外还拍了好几集的电视特别节目！

Nick Chapman graduates from film school, and his short film wins a special prize. This gives him a high enough profile that he can get Hollywood to back the film he has long dreamed of making. Studio exec Allen Habel is interested. But Nick soon is seduced by Hollywood and makes one concession after another until his original movie is lost altogether. Worse, Nick is lost, too, turning on girlfriend Susan and old buddy Emmet. Will he come to his sense before everything is lost?