Modern chief forensic examiner Lin Yan tragically falls into the water while pursuing a suspect, only to transmigrate into the body of Shen Qingyan, the second daughter of the Vice Minister of Personnel's household in the Great Jing dynasty. The original owner was timid, bullied by her legitimate elder sister, and her fall into the water was shrouded in suspicion. Bringing with her the professional skills of a modern forensic examiner and an unwavering determination to uncover the truth, Lin Yan feigns amnesia and investigates in secret. By chance, she meets Xiao Jingyuan, the brilliant deputy minister of the Court of Judicial Review.
With her unique forensic perspective and criminal-investigation mindset, she repeatedly helps Xiao Jingyuan solve strange cases, from baffling poisonings and serial murders to infighting within powerful households and plots by corrupt court officials. She follows the smallest clues to find the real culprit and upholds justice amid deadly clashes. Xiao Jingyuan is drawn to her intelligence, courage, and individuality. From his initial suspicion to his later devotion, the two join forces to solve old mysteries and expose conspiracies at court.
Within the household, she puts an end to her elder sister's jealousy and the family's infighting. At court, she helps Xiao Jingyuan stand against corrupt officials and restore order. In the end, after surviving life-and-death trials, the two are blessed with an imperial decree arranging their marriage. Even after their wedding, they remain united in protecting the capital's peace and justice. Their young child carries on their legacy and their commitment to justice. Lin Yan not only finds love and a home in ancient times, but also uses her forensic expertise to write a new chapter in her life, allowing justice to transcend time and warm the long river of years.
