Shen Ning, the legitimate daughter of the General's Mansion, didn't know until her death that the eldest sister she had believed in for half her life was a fake. Because of her eldest sister's deception, she thought she had lost her virginity to King Chen, and gave him her sincerity. On the day she married Prince Chen, she was taken into the palace by Prince Regent Xie Linyuan and became the Princess Regent. He also became the pawn arranged by the eldest sister and King Chen to be around Xie Linyuan. Her wrong letter caused the tragic death of her entire family, and Xie Linyuan also died at her hands. When she opened her eyes again, Shen Ning returned to the night of the poisoning and recognized that the person who detoxified her was Xie Linyuan. But she didn't expect that Xie Linyuan would also be reborn.