During the Yuanxi period of the Great Yan Dynasty, the Zhenguo Palace was destroyed. The young girl Shen Qingci was rescued by an old servant, and she disguised herself as a man and hid among the people. Sixteen years later, she returned to the capital as Jieyuan, with only one goal: to find out the truth and make her enemies pay with blood. However, in the court hall, she met that person - Xiao Heng, the ninth prince of the current dynasty. On the surface, he was as gentle as jade, but in reality, he was deep. He was the most inconspicuous and dangerous existence among the princes. The two went from testing each other to joining forces to play games, from being ambiguous to being in a life-and-death relationship. In the turbulent court, they gradually uncovered the huge conspiracy shrouding Dayan.
