Stephen, living in a troubled family, breaks into a grocery store and wreaks vandalism. He is sent to a reform school. Later he works in a cleaning brigade and accidentally meets József Draskóczi, who denounced him. Draskóczi lives in an unloving, troubled atmosphere with his barren daughter and cynical son-in-law, ascetic about his youthful communist beliefs. He feels responsible for Istvan's fate, offering him a human voice and love. Despite his daughter's hysterical jealousy, he sends Istvan to school and then, through his previous connections, provides him with an apartment...

Based on a true story, a love affair develops between a half brother and half-sister. When pregnancy results and word gets out the public is outraged.