Yun Zhiyi, the legitimate daughter of the Yun Mansion of the Dasheng Kingdom, was publicly divorced by the Prince of Jingan during the hairpin ceremony. She accidentally triggered the fragment of the "Xuanji Picture" in the family guqin, and only then did she learn that her mother's death hid the secrets of the previous dynasty. In order to find out the truth, she was admitted as a female official, but she was involved in a century-old dispute between a prince and a poor family.
The seventh prince Xiao Jingheng looks as gentle as jade, but he is actually the "Prince Yinlin" in charge of the Xuanjia Army. He pointed out the evil in the court, but his life was in danger because of a strange poison in his body. When a strategic girl who is good at playing the piano and can master the gods meets a frail prince with a sword hidden in the mountains and rivers, the salt tax mystery, imperial examination fraud, and border wars follow one after another.
When she used the piano as a blade to break the situation, little did she know that the last mechanism of Jiuxiao Huanpei was related to Xiao Jingheng's life and death...
"I want everyone in the world to watch this game of chess -" Yun Zhiyi brushed his sleeves across the sand table, "How a woman holds her chess, how her advisers will overthrow the country!"
