The marriage between the maid Irene and the wealthy heir Franz was supposed to be a love match. However, after a shocking revelation from Franz's father, Irene leaves Franz without a word. Alone, she gives birth to her son Fränzl and takes a job as a textile worker in a factory. There, she is confronted with inhumane working conditions. After several years of bitter toil, Irene meets the labor leader Josef. Although she still loves Franz, she begins a relationship with him. Franz is deeply depressed by Irene's departure, especially since he does not know the reason for it. But one day, Irene unexpectedly stands before him...