Xue Wenxi comes from a poor family, and disguises as a guy to make ends meet by helping to transcript and copywrite books. She meets Feng Chengjun, the son of Prime Minister Yun, who acknowledges her talents. Feng Chenjun secretly planned a setup so that Xue Wenxi was appointed by the Emperor, and enrolled in the Yun Shang Academy which only accepts male students. There, she befriends the rebellious and unrestrained Yu Yuexuan and the cold and aloof Lei Zexin. The four become known as the "Yun Shang Quartet" and assists the Emperor in managing the country. Through their hard work, the lives of the people began to improve. However, in the quartet's attempt to bring down General Han, a powerful man who attempts to interfere in courtly affairs, Xue Wenxi's identity as a girl and Feng Chengjun's identity as the Crown prince of the previous dynasty were exposed. In the time of chaos and unrest, Feng Chengjun assumes his position as the Crown Prince, and led the quartet in an expedition to defeat the enemies. They ultimate find victory in protecting the peace of their homeland, and fulfills their vision of serving the people.
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