This documentary focuses on the third part of Luciano Berio’s Sinfonia, which consists of a number of musical quotes from composers like Mahler, Stravinsky, Boulez, Schönberg and Stockhausen. Each quote is illustrated with rehearsal footage, interviews or performances of the original material. Images of a river connect each quote, just as Berio used a river as a connecting element in his composition: “A river running through a constantly changing landscape, disappearing from time to time, only to emerge later totally transformed.”