The heroine Jiang Fuling is the daughter of the chief of the Royal Hospital. She was born with a rare "evil life": her blood can detoxify hundreds of poisons, but it will also leave a fatal "blood curse" on those close to her. In order not to hurt others, she had to poison herself to suppress the blood curse. After her father was unjustly killed, she was thrown into the cold palace with her incompetent magical skills. On the surface, she was a humble slave, but secretly she used "medicine" as a sword. The deposed prince Yu Jin was under house arrest for ten years. He was poisoned by three kinds of strange poisons and his legs were disabled. All forces in the DPRK and China thought he was dead. The moment Jiang Fuling used a set of "fighting poison with poison" acupuncture to make him stand up, the entire power structure of the Zhou Dynasty was completely torn apart - she entered the palace as a medical woman, the deposed prince took advantage of the opportunity to come back from the Ministry of War, a woman who wanted revenge and a man who wanted to seize the throne reached a fatal deal with the court as a chessboard and human life as a bet.
