The film focuses on a little-known episode in the history of the 20th century: the Polish-Ukrainian alliance concluded by Marshal Józef Piłsudski and ataman Semen Petliura in 1920 in order to oppose Soviet Russia. In front of the camera, Jerzy Giedroyc, Norman Davies, Daniło Husar Struk, Arkadij Żukowski, Aleksander Kolańczuk, Wołodimir Serhijczuk, Wasyl Michalczuk, Gen. Stefan Tarnawski, Józef Hartowski and Tadeusz Olszański.