Both Cousins

They are both cousins ​​of the Marquis of Xuanping, Zhou Ruoyin is the only daughter of the direct sister of the Marquis of the Marquis, and Pei Yiyan is only the daughter of the brother of the concubine of the Marquis of Xuanping. Both of their parents are dead. One is from an official family, and the other is just a commoner. The fate of the two people seems to be the same, but they are completely different. Pei Yiyan, who was originally delicate and considerate, gradually changed her temperament due to the seeming contempt and unfair treatment from others. On the surface, she was gentle and kind, but in fact, she was always stirring up trouble, intending to replace Zhou Ruoyin as the crown prince of Xuanping. When an alien soul replaces Pei Yiyan, where will the plot go...