The Italian soldier Giuseppe Santucci, on his way home from the Russian front has his machine gun stolen in Warsaw. Afraid of consequences, he stays in Warsaw and occupies a flat of the Polish girl Maria, whom he suspects of stealing weapon. Maria indeed is an active member of the Polish resistance, contrary to her brother, Staszek, a painter, who only wants a calm living. In a course of events Giuseppe falls in love and, along with Staszek, becomes a hero of the Polish resistance.
Elżbieta Czyżewska
Antonio Cifariello
Zbigniew Cybulski
Jarema Stępowski
Krystyna Borowicz
Aleksander Fogiel
Andrzej Gawroński
Zdzisław Maklakiewicz
Jan Matyjaszkiewicz
Artur Młodnicki
Józef Pieracki
Aleksander Sewruk
Wojciech Siemion
Jadwiga Skupnik
Zenon Burzyński
Halina Buyno-Loza
Bronisław Darski
Wiktor Grotowicz
Henryk Hunko
Roman Kłosowski
Jarosław Kuszewski
Zdzisław Kuźniar
Jan Łopuszniak
Mieczysław Łoza
Kazimierz Meres
Andrzej Mrozek
Ludomir Olszewski
Kazimierz Ostrowicz
Adam Pawlikowski
Andrzej Polkowski
Ryszard Ronczewski
Tadeusz Schmidt
Mieczysław Stoor