Camilla Lundberg examines the quintessence of classical music: the string quartet. Meet the young Dahlkvist Quartet, the old Amadeus cellist Martin Lovett, writers, movie stars, Freskvartetten, Fläskkvartetten, Lundberg's own home quartet and other strings in the very masterpiece from Haydn to Hillborg. What is remarkable about the string quartet? Must there be just two violins, one violin and a cello? What has made this combination so durable throughout the centuries?