Modern forensic doctor Shen Qingtang travels back in time to become the bullied concubine of the ancient Shen family. Because her sister-in-law ran away from marriage, she was forced to marry Pei Heng, the prince of Zhenbei, who was rumored to not survive more than a year. After her marriage, she relied on the insight and calm mind of modern forensic medicine to not only expose the conspiracy within the palace to murder the prince, but also discovered that her life experience as a "war orphan" actually involved the secrets of the previous royal family. Faced with the continuous oppression of her natal Shen family, the rejection of the powerful elites in the capital, and the impact of the court turmoil, Shen Qingtang used her identity as the "sick concubine" as a cover, and joined forces with her husband Pei Heng, who appeared to be sick but was actually tolerant of the plan. Starting from solving a series of shady cases in the inner house, Shen Qingtang gradually became involved in the court game. In the end, she not only rectified her name and exposed the truth about the collusion between the Shen family and the enemy, but also helped Pei Heng break away from his puppet status in the chaos and become a prince who truly dominated one side. She also completed her transformation from an outcast to a chess player.
