Poland, 1945. Crowds of repatriates are traveling from east to west in search of new homes and loved ones lost during the war. At one of the train stations, a young woman, Hanna Powiłańska, sits among the crowd of displaced persons. The girl recalls a story of turbulent love. Before the war, at a carnival ball, she met the handsome Lech Oleszkiewicz. In September, war broke out. Hanna meets the engineer again and spends the night with him. In the morning, the man tells her that he is married. Hanna breaks off the relationship.