Yun Hang, a graduate of traditional Chinese medicine, encounters a mysterious fragment at an old bookstall on a rainy night in Spring City. It turns out to be the authentic copy of the "Nei Jing" that has been lost for thousands of years, hiding the secrets of the Five Elements and Bagua and the legend of the Seven Star Pill. This fragment of the book attracted the covetousness of many forces. Peeping at the door late at night and malicious pursuits followed one after another. The respected old Chinese medicine doctor Chen Huaian was also assassinated by evil magic and fell into coma. In order to save Mr. Chen and protect the original book, Yunhang took over the mission of protecting the book and joined hands with Mr. Chen's disciple Lin Wan to decipher the code of the remaining scrolls and find the Seven-Star Alchemy. In the urban jungle and hidden secrets, he dealt with the ambitious alchemy sect forces and gradually uncovered the thousand-year-old truth about the secrets of the "Inner Canon" and the Seven-Star Alchemy, embarking on a fantasy adventure of elixir that is both dangerous and missionary.
