Su Jin, a top modern forensic doctor, was dissecting the body of a Qing Dynasty noblewoman who was suspected of being poisoned. The Pisces jade pendant worn by the body was involved in the turbulence of time and space, and her soul was transformed into Shen Yuwei, a waste concubine of the Dayin Dynasty who was thrown into the cold palace and was poisoned by a strange poison. The original owner was the daughter of a general, but because of her family's crimes and the emperor's rejection, she became the laughing stock of everyone in the harem.
Relying on the knowledge of forensic toxicology and the golden finger of the "portable forensic box", Su Jin not only detoxified herself from strange poisons, but also used medical skills as a blade and autopsy as a shield in the crises of palace battles: she uncovered the miscarriage of the beloved concubine, uncovered the chronic poisoning in the imperial kitchen, and even revealed the truth about the sudden death of the late empress ten years ago through trace analysis of the empress's daily necessities.
She originally wanted to keep a low profile to save her life and find a way home, but unexpectedly discovered that the "rebellion case" of the original owner's family had another hidden agenda. The seemingly indifferent emperor Xiao Jingyuan was inextricably linked to this old case and even her time travel. When the battle in the palace escalates into a game of intrigue in the court, and when the "waste concubine" counterattacks and becomes a being who can control the world with the emperor, Su Jin realizes: this time travel is never an accident, and what she wants to reverse is far more than her own destiny.
