An Algerian doctor decides to leave the troubles in Algiers and goes back to his hometown, a small village lost in the mountains. There, however, the situation is explosive as well, as the guerilla is active and the French military has to keep a close watch on the locals...
Town trollop Safia, much against her better judgment, falls in love with Matteo, a beggar and mystic in the native quarter of Sirocco. She flees to France, first as the mistress and then wife of a wealthy archaeologist, and bears him Matteo's child, whom he believes to be his own. Complications arise years later when Matteo finds Safia, and a ring of blackmailers uncover her past and exposes her to her husband.
In Algiers, Cesar Sarati who grudges the dockers, is, without realizing it, in love with his niece. But Rose loves Gilbert, a former gambler and debauchee who, out of love for her, changes his life. On the wedding day, Sarati commits suicide.
