Yun Ruoxi was originally a daughter of the Xinglin family. She hid in the alleys of the capital and opened an inconspicuous medicine shop to avoid trouble. The medical fee was only one penny, but her medical name was quietly spread through several strange cases. She accidentally broke into the scene where the prince was plotting to poison the old minister, and was forced to use acupuncture to seal the acupuncture points to extend the old minister's life for three days. As a result, Yun Ruoxi was regarded as a rare commodity by the eunuch of the East Factory; Xi circled between the deep house and the palace wall, while using the "Five Elements Acupuncture Technique" to hang up the Queen Mother's wind, and at the same time using the silver needle at the birthday banquet to remove the poison, which aroused the suspicion of the regent Bailiheng; she found that the medical record left by her late father contained a secret file from the time of the death of the late emperor, which contained the mystery of Bailiheng's life experience - this strong-armed prince was actually replaced by a civet cat. The eldest son of the prince; Yun Ruoxi holds a secret but dare not reveal it, so she can only retreat to advance, deliberately losing to the medical girl of the third prince's house at the Xuanhu Hall meeting, trying to hide herself deeper; but Bailiheng has already set his sights on the black iron bracelet on her wrist that never leaves her body, and the long-lost "Thirteen Needles of the Ghost Gate" is sealed in the bracelet; the Queen Mother suddenly died suddenly, poisoned Pointing to Xanthium in the medicine shop, Yun Ruoxi was taken to prison, but in the sky prison, she used a silver needle to pry open the mouth of the jailer, and found that all the clues pointed to the palace scandal of "no imperial edict" twelve years ago; she must find the real culprit before Chunwei releases the results, otherwise Bailiheng will be deposed for treason, and the child she is carrying will become the next abandoned child.