The head of Ai Zhentang, a family of traditional Chinese medicine, and his wife both died, leaving their daughter Qin Zhiai to continue practicing medicine and saving lives. She accidentally saved the immortal puppet Meng Zongzhu. Meng Zongzhu came to the clinic with a secret to investigate the cause of death of Yun Shi and his wife, and used the identity of the immortal puppet to control the little medical fairy and become her master. From then on, the two of them traveled together to save the world and were involved in a series of court disputes. In the end, the truth about the cause of death of Yun Shi and his wife was revealed, and Qin Zhiai also successfully saved the emperor with her superb medical skills and became the "little medical fairy" bestowed by the emperor.