A concert movie showing a performance by the much-loved 1973 incarnation of the Mothers of Invention. An incredible cast of musicians treat us to a selection of blistering, pointillist jazz rock, hilariously funny asides and lyrics, audience participation and freaky behaviour. Featuring Frank Zappa (guitar, vocals, mysterious hand signals), Napoleon Murphy Brock (lead vocals, saxophone, flute), George Duke (keyboards, vocals), Ruth Underwood (pyrotechnic displays of percussion mastery), Bruce Fowler (Trombone), Walt Fowler (bass), Chester Thompson (drums) and Ralph Humphrey (drums).