Transmigrating to the primordial world, he is reborn as Zhen Yuanzi, the ancestor of earth immortals. Holding the Book of Earth and bearing the destiny of the Earthly Dao, he dedicates himself to protecting all living beings in the primordial world, ensuring it doesn't become a lowly world, inferior even to a minor world, due to the selfish interests of the Heavenly Dao and Hongjun. To give every living being in the primordial world the opportunity to attain eternal enlightenment and reach the pinnacle of the Dao, Zhen Yuanzi, with his precognitive memories, unites with Houtu, opens the cycle of reincarnation, restores the Earthly Dao, and supports humanity. Bearing the hopes of countless beings, he embarks on the path of suppressing the Heavenly Dao and Hongjun, helping the primordial world achieve its unique true realm.