The young count makes a bet with his friends about who will be the first to win the favor of a girl they meet. The opportunity to meet her arises unexpectedly quickly.

Two young men from the margins of society start a spiral of crime that gets out of control.

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.

Contemporary Poland. Teenager Zosia Zadora decides to start an adult life. She runs away from home, settles with two friends in the Tri-City. Here she experiences her first love. The sympathizer, twenty-year-old Kostek, turns out to be the head of a criminal group. Zosia's roommates are involved in the procedure. When Kostek is arrested, the girl, after some hesitation, becomes a prostitute. She tries to hide her profession from a young sailor she met, Stefan Janiak, with whom she began to have feelings. One day the man learns the truth.