The film is dedicated to the jazz music festival in Leningrad (St. Petersburg). Jazz groups perform on stage (synchronously): Goloshchekin's ensemble, Leonid Chizhik's trio, Melodiya ensemble under the direction of G. Garanyan, Modo ensemble (Riga), Vyacheslav Ganelin's trio (Vilnius). Among the musicians: P. Kornev, A. Kuznetsov, K. Zubov, K. Nosov, B. Frumkin, M. Weiner, B. Bannykh, V. Boldyrev, Vl. Tarasov, Vl. Chekasin. Views of the city of Leningrad (removed from traffic, rivers and canals), buildings, bridges, embankments. The movement of the boat with the jazz ensemble "Leningradsky Dixieland" on board (day and evening shooting). The musicians of the ensemble are playing. The movement of the tug. Landscapes.