Zhao Reng, who majored in ancient Chinese, was assigned to be a Chinese teacher at Haibin University after graduation. Later, he went into business and ran a bra and underwear factory. He met his college students Qian Yan and Sun Gui at a dance. Zhao Feng married Qian Yan. Sun Gui was introduced by Qian Yan and became the manager of the trading department of the underwear factory. Later, he went to Hong Kong for an urgent matter. Qian Yan's classmate Wu Jia worked in the Municipal Public Security Bureau and helped Zhao Feng and Sun Gui successfully sign the Hong Kong Pass. Wu Jia is divorced.
The southern suburbs is an ancient town with a profound cultural foundation. There is a Dream of Red Mansions Karaoke Hall. Zhao Reng and Wu Jia are both fans of "Dream of Red Mansions". The Dream of Red Mansions Karaoke Hall was later bought by Zhao Reng due to financial problems. The story goes through the development of Renmei Bra and Underwear Factory, takes the Dream of Red Mansions karaoke hall as the scene, and uses the society of the past 20 or 30 years as the background to think about culture, human nature and love.