At the center of the plot are the fates of two sisters, Jirina and Zofka, who find themselves from the countryside in the metropolitan environment of Prague and learn about its dark side when they get into the company of the dubious existence of the suburban brothel, fake gamblers, pimps and hiders. Among them is also the director of the factory, Jirina's benefactor. There is a fight and police intervention in the gambling den. Zofka tries to save her seducer and return him to an honest life. But fate decided otherwise, perhaps better for all involved.