Kueiyuan is a deliveryman for a cosmetics company. He is a womaniser and dreams of making a quick buck. He meets a romantic 20-year-old girl, Qingmei, who feels trapped by her mother’s small restaurant and is eager to escape. Kueiyuan earns a commission fee by introducing Qingmei to a cabaret, run by Yuchan. Qingmei falls in love with Kueiyuan and sleeps with him. However, under pressure from Kueiyuan and Yuchan, Qingmei agrees to become a mistress to an old millionaire. Meanwhile, Yuchan seduces Kueiyuan and controls him with money and sex. When Qingmei discovers that she is pregnant by Kueiyuan, the latter demands an abortion. Qingmei runs away and hides. When Kueiyuan proposes marriage to Yuchan and is rejected by her, he finally realises that he is in love with Qingmei and goes out to look for her.
