After an accident in the lab, Zhao Yun, a third-year medical student, discovers that he has gained a set of memories from three hundred years ago. He had once been a cultivator who reached the Deity Transformation Realm in the Investiture of the Gods world, only to fall in the Ten Thousand Immortals Formation. Back in the modern world, he is a medical student by day and a mystic cultivator dealing with supernatural incidents by night. When one of his patients turns out to be a young woman harmed by dark sorcery, he meets Xu Wenjing, a middle-school teacher determined to uncover the truth. From mutual suspicion to fighting side by side, the two gradually discover that an old enemy from the age of the Investiture of the Gods has been pulling the strings all along. Three thousand years of grudges remain unsettled, and the Ten Thousand Immortals Formation is about to unfold once more in this city. What will happen this time...?