Two school troublemakers decide to become better students. They visit their suspicious teacher everyday after school to ask questions and offer help. When their teacher falls ill due to overwork and is hospitalized, they decide they must find a way to show their appreciation.

Oh Ka-hi is a popular madam in a nightclub in Mu-gyo-dong street. She supported her widowed mother and sister by working in a factory. Ka-hi and Tae-su, an honest boy, were in love. Then Dal-su, an animal of a man, raped her. With that, Ka-hi went from working at a bar to becoming a hostess at a cabaret. Ka-hi meets Hyun-wu and gets pregnant by him. She gives birth to Suk but learns too late that Hyun-wu is a married man. Dal-su persistently hounds her. He steals her bank account and takes the money she had earned with her tears and blood. To be worse, Suk dies from gas intoxication. Ka-hi falls into despair. Duk-sam, a driver, takes care of her. Ka-hi slowly rises from her nightmarish reality. In the end, she accepts Duk-sam's marriage proposal.

A woman raising her younger sister must drive a taxi for a living.