The heroine, a well-behaved prisoner, goes to Seoul after spending her special leave. In the train, she becomes acquainted with a man who is traced on charge of a counterfeiter. She indulges herself in sensual desire because of him. They promise to meet on the next day, but the man breaks his promise. She heads toward prison in despair, but he is waiting for her in front of the prison. The police arrest him after giving her underwear.