Su Wanqing, the legitimate daughter of the Duke of Zhenguo, mistakenly trusted relatives and friends in her previous life, and was tricked by her concubine and the third prince to have her entire family executed. Before her execution, she learned that the "sick" seventh prince Xiao Yexuan had been secretly protecting her. Reborn as a fifteen-year-old, she returned with memories of modern forensics and pharmacy. She first used evidence and medical skills to establish her authority in the inner chamber, visited the palace at night to treat Xiao Yexuan, and reached a mutually beneficial agreement. In order to escape the shackles of the inner chamber, she entered the imperial hospital as a female official. She became famous for solving strange cases. She secretly established the "Through the Looking Glass" chamber of commerce and intelligence network, traced the old evidence in her father's case, and pointed directly at the Quan Eunuch Ningguo Hou. On the way, she discovered fraud in the imperial examination and was awarded a gold medal by the emperor. Since then, she has completely developed a feud with the third prince and the family. However, at the emperor's birthday banquet, she was backlashed and imprisoned. The seventh prince was banned and the prince was deposed. The rebellion was almost desperate. On the eve of the execution, she used her vest power to save herself from trouble, carried the late emperor's edict and irrefutable evidence, launched a public opinion war and military liquidation before and after the ceremony to sacrifice to heaven, and joined hands with Xiao Yexuan to clear the emperor's side and Zhaoxue's old case to re-determine the court situation. When the dust settled, she resigned and founded a women's medical school to help the world with her skills; he returned power to the new emperor and only allowed her to have the light of the city and the peace of the world.