The film deals with the German bar singer Wilkie, who lives in Zürich and falls in love with the Jew Robert, who belongs to the upper class. His father, the head of a Jewish relief organization, tries to stop their relation shortly after the outbreak of World War II. During the war the singer earns prestige by singing the popular Song of Lili Marleen. Because of the relation to her Jewish lover she loses her protection. Robert gets married to a woman from his background and with this plunges Wilkie into disaster.