During the Yongle period of the Dajing Dynasty, Shen Qingci, the proprietress of the "Tingfeng Tea House" near Fengqiao in Gusu, took in Lu Jingran, a scholar who was avoiding trouble. The teahouse is a gathering place for merchants from the north and south, and it is also a secret base for the flow of information. Shen Qingci relied on his keen insight to secretly collect business information, but was accidentally involved in a water transport smuggling case. Lu Jingran used his knowledge to sort out clues for her, and the two teamed up to help the government solve the major case, making Fengqiao Teahouse a serious business information hub.
