The orphan Princess Qingque (played by Xiao Yu) is reborn in a wrong love and becomes an Oiran. Just because her enemies gather at the Mu Palace, she sets up a plan to marry the enemy who killed her father, Mu Wang, as a concubine. The brave and treacherous general Yun Huan (played by Li Jiulin) kills his first love with his own hands and becomes the son-in-law of the palace, but finds out that his new mother-in-law is actually his old love. Living under the same roof, the mother-in-law and son-in-law hide their past love, each with their own ulterior motives, and are in danger at every step. But when the grudges are revealed, it is a deep love without regrets. When black and white are mistaken, it turns into an unsolvable dead end. Can the lovers renew their previous relationship and fulfill their promise?