The chaos of the immortal realm, caused by the fall of the gods and the loss of the enigmatic "Book of Life and Death", had occurred a hundred thousand years prior. During one scientific expedition, Lu Yun stumbled upon an unidentified burial chamber, thus beginning an unpredictable journey to unravel the secrets it held. By the Book's power, he was transported to the Immortal Realm and appointed to shepherd Xuanzhou City. However, it was no easy task as he faced stiff competition from rival families and was unable to cultivate. Determined, he sought the Jiuqiao Jindan, altering his physique with the help of his female envoy to maintain his position. Through their venture into the tomb of the Xuanchi Mountain, they encountered daunting obstacles that included a thousand-year-old corpse monster, swarms of corpse flies, and the alluring Shi Ling queen. The discovery of a portrait led them to Dan Xian Yuying, the last Xuanzhou prefectural shepherd, and the first messenger of reincarnation in the Book of Heaven. With her aid, Lu Yun successfully transformed his physique and negotiated with Emperor Langxie to preserve his identity. However, strange visions plagued him at night, and the Book of Heaven's power manifested within him, causing the heavenly book to shake violently. Despite this, Lu Yun determinedly sought the truth by venturing into the murky depths of the neighboring Xuanshui City, rescuing a helpless child, and battling hordes of monsters along the way. With his unwavering resolve and the Book's power, he overcame the demonized Xuanhe River God and obtained new-found abilities. Lu Yun conquered each of the messengers of reincarnation, each representing the pinnacle of Talisman Dao, Martial Dao, Formation, and Refining, through his relentless pursuit of truth, even if it meant challenging the will of heaven and earth. Yet, the curse king observed his progress cynically from afar, dismissing him as a mere ant.