In order to avenge her mother's deep hatred, Xiao Yunshu, the concubine princess of the Beili royal family, joined forces with the deposed prince Mingxuan Yu of the Rui Dynasty. However, in the process, she discovered some ulterior secrets between the Beili royal family and the Rui Dynasty royal family. In the end, both of them achieved their respective goals and worked together for a great cause.
