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

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.