They once lived in Changgan Lane and, as children, couldn't stand each other. Years later, the model student Jin Yunduan became a terrifyingly strict doctor, while the troublemaking underachiever Lu Zheng became a hot commodity. The two, who had always rubbed each other the wrong way, gained a new understanding of one another after a case of mistaken identity involving a possible syphilis diagnosis. As a doctor, Jin Yunduan saw marriage and children as burdens. Lu Zheng had always thrived in his colorful, complicated social circle, but then he suddenly realized that when it came to Jin Yunduan, he wanted to settle down.