Kłamstwo Krystyny.

Living only with her elderly father, Krystyna runs the household and works as a modest clerk. However, her fate takes a turn. The girl gets a job at a company, and one of the clients, Jan Merlecki, wins her heart. Things quickly become complicated, though. An anonymous phone call to her beloved's parents, followed by their intervention to prevent the young couple from marrying, prompts Krystyna to make a dramatic decision.