Shen Zhiyi, a talented acupuncturist who was expelled from a medical family, returned to the city with the banned ancient acupuncture technique, and used one needle and one blood to expose the family's bloody medical technique of "exchanging lives for lives." Field doctor Qin Zhao becomes her ally in the dark night, while her cousin Yu Qinghe's hypocritical mask, her father Shen Chongde's human sacrifice needle, and the secret files of the crazy dean Chen Yansheng have torn apart the thousand-year-old shady story of the medical world. When the terminally ill girl Lin Sui becomes the only living body that can carry the forbidden needle, Shen Zhiyi must pierce the entire altar of hypocrisy between saving one person and destroying an entire lineage.
