Four modern best friends, Lin Wanxing, Su Yuran, Xia Zhi, and Tang Nuo, accidentally traveled together to the fictional Dasheng Dynasty and became respectively a peasant girl, a scholarly legitimate daughter, the daughter of a wealthy businessman, and the granddaughter of a down-and-out military commander. In ancient times when etiquette was strict and women's status was low, four people unexpectedly met each other and decided to join forces to rely on their respective expertise to establish a foothold. They started by setting up snack and cultural creative stalls, and opened Siyou Trading Company. With modern business ideas and tacit cooperation, they overcame suppression from aristocratic families, business competition, and etiquette difficulties. They even went to Beijing to develop markets and established a women's school. Although they were framed by conservative forces, the four of them still worked together to overcome the danger and eventually became imperial businessmen, promoting the trend of women studying and doing business. In the end, trading companies spread all over the country, and schools benefited thousands of women. The four of them each realized the value of their lives and became legends of their generation.
