During the winter of 1944, the partisans stationed in the Ligurian Apennines must go to a factory in Genoa, in order to pick up a delivery of weapons. Meanwhile, there's a strike in the city and the Nazis are trying to suppress it violently. The factory becomes the scene of fighting between the Germans and the partisans but the latter, aided by the workers, will be able to get the better.

義大利佛羅倫斯，1925 年，法西斯專政時期。為了住在女友 Bianca 身邊，年輕的 Mario 搬到舊市中心一條簡陋的街道，並在那裡結識了 Maciste 和 Ugo 這兩位反法西斯人士。