Mo Jianlan grew up in a traditional Chinese medicine hall in Cangqing, and didn't really leave Cangqing until he was eighteen years old.
His childhood experiences have determined his character of always thinking twice when encountering problems, and also created a worldview that is different from that of normal people. Cangqing's ageless appearance in eighteen years and the true identity of "Aunt Li" have become lingering doubts in his mind.
After leaving the Chinese medicine hall, Mo Jianlan, who met his biological mother for the first time, raised his own questions, but only received an ambiguous answer from his mother, a famous onmyoji.
While he was sharing the family business and helping his mother take care of the declining business, one after another mysterious and strange people broke into his life, and they all seemed to be inextricably linked to Cangqing.
Until one day, when he thought he knew Cang Qing's identity and returned to the Chinese Medicine Hall, he was told that everything was far from that simple.