Lee Kuk-tae, a sociology professor, deplores the collapse of Korean morality. On TV, he denounces bar girls as being the reason why men have affairs. Subsequently, the bar madams in the city are outraged. They start plotting a conspiracy against Professor Lee. As part of the plan, Su-jin seduces Professor Lee but she develops true feelings for him. Likewise, the professor has fallen in love with Su-jin. Betrayed by Su-jin, the madams denounce her. However, when Professor Lee announces that he's going to marry Su-jin, they wish them happiness in earnest.