Adapted from the novel "The Days of Confucian Scholars in Sungkyunkwan", it tells the story of Xue Wenxi, who comes from a poor family and makes a living by copying books and writing for others, but accidentally runs into Feng Chengjun, the son of the governor of Yun State. Feng Chengjun appreciates her talent and secretly sets up a plan to allow Xue Wenxi to pass the exam and enter the Yunshang School, where only men can study. In order to hide her identity as a woman, Xue Wenxi walks on thin ice all day long. Fortunately, with the help of Feng Chengjun, she can study with peace of mind. Her smart, kind, tenacious and optimistic personality charm makes the unrestrained Yu Lexuan regain her dignity and the unruly Lei Zexin rekindle hope in his heart. The four form the "Four Heroes of Yunshang", and they influence each other and grow together in the process of overcoming various difficulties. Xue Wenxi exposes her identity as a woman, and she and Feng Chengjun fall in love with each other, and involve the grievances and disputes of the previous generation. In order to inherit the will of their ancestors and realize their ideals, the four people are caught in crisis...