Shen Wan, the adopted daughter of the Shen family, is actually Gu Yanning, a girl born to a farming family. In her previous life, she was sacrificed through a conspiracy between the Shen family and the Crown Prince, and she died tragically alongside her beloved, Xie Yujin. Reborn one day, she pretends to be obedient while dismantling the Shen family's and the Crown Prince's schemes step by step and exposing the truth behind the exchange of the true and false heiresses. Using her medical skills and wisdom to take revenge on all her enemies, she secretly supports Xie Yujin, the Duke of Zhenguo who protected her in her previous life. Together, they confront power struggles at court, destroy the foundations of the Crown Prince's and the Shen family's schemes, and ultimately free her from the Shen family's control. Hand in hand with Xie Yujin, she sets out to find her family and safeguard a clear and peaceful future.