Duan Qingruan, the princess of the Dali royal family, never thought that she would eventually follow her mother's path and become a betrothal princess, and Xiao Xing, the idle prince in Beijing, also never thought that he would marry a betrothal princess from Dali; behind the seemingly unchosen marriage, there are secrets of the royal family of the past, and the seemingly calm court is full of undercurrents in the shadows. The betrothal princess and the idle prince will join hands to survive the storms of the court.