Yun Li, an 18th-generation descendant of the Spirit Physician Clan from the 23rd century, is drugged by enemies of the Ghost Physician Clan and forced to jump off a cliff to avoid capture. She transmigrates into the body of the Third Young Miss of the Prime Minister’s Residence in the Yueqi Kingdom. The original host was a concubine’s daughter with peerless beauty, which made her a target for jealousy. Her two legitimate older sisters, led by the Eldest Young Miss Yun Ran, had previously drugged and disfigured her. On the night of the transmigration, Yun Li is targeted by Granny Fang, who intends to ruin her chastity and reputation by forcing her to sleep with a beggar. Yun Li kills the beggar with a needle and discovers she has inherited a portable space within a jade bracelet, containing a modern supermarket, medical facility, and weapons warehouse. She uses the space to neutralize the poisons in her body, including a lethal aphrodisiac known as Flower Passion Poison, which requires sexual contact as a temporary antidote.
To survive, Yun Li disguises herself as a man and visits a brothel, where she encounters Prince Yu, who is tied to a pillar due to his own affliction with Netherworld Poison. She uses him as the antidote for her poison and subsequently treats his condition with acupuncture, extending his lifespan by three years. She leaves him a note and some medicine before returning to the Prime Minister’s Residence. There, she frames her sister Yun Ran by placing the dead beggar in her bed and stealing her treasures. The Prime Minister, Yun Qingshan, discovers the scandal and confines Yun Ran, while also deciding to marry off Yun Li to remove her from the household.
Yun Li then investigates the condition of Zhao Momo, the wet nurse who raised her, and discovers she has been poisoned with Bai Ku Poison by Su Meixian, the Prime Minister’s wife. Yun Li secretly rescues Zhao Momo and hides her in her portable space for treatment. She also uncovers an affair between Su Meixian and the household steward, Du. Using a drone and megaphone from her space, Yun Li broadcasts the adulterous conversations to the entire capital, causing a public scandal that humiliates the Prime Minister and his family. The rumors spread rapidly, damaging the reputations of both Su Meixian and Yun Ran.
Meanwhile, Yun Ran is discovered in an illicit encounter with Prince Duan, Helian Qi, the second prince. Due to her tarnished reputation, Yun Ran is forced to marry Prince Duan, which inadvertently strengthens his political position. Prince Yu, grateful for Yun Li’s medical help, begins searching for her, declaring her dead but vowing to find her. Yun Li continues to consolidate her power within the residence, planning to expose more secrets and protect those loyal to her. The story follows her navigation of court politics, family intrigue, and her use of modern technology and medical skills to overturn her fate in a hostile ancient environment.
