This is a world where spiritual energy reigns supreme—whoever possesses the power to devour the heavens and swallow the moon shall be the Great Ruler! In the vast universe, countless paths contend for supremacy. On the road to dominance, who will rise to the top? Young Mu Chen, born with extraordinary talent, hails from the Mu Territory, one of the nine great domains of the Northern Spirit Realm. His father, Mu Feng, is the lord of the Mu Territory and now serves as the leader of the Northern Spirit Alliance. His mother, Qing Yanjing, is a divine maiden of the Floating Ancient Clan, forced to leave when he was young to protect her son and husband. From that moment, Mu Chen vowed to one day find his mother. After enduring storms of blood and strife, he rescues his mother and becomes the clan leader of the Floating Ancient Clan. At the Ten Thousand Ancient Assembly, Mu Chen successfully obtains the Ten Thousand Ancient Immortal Body, ascending to the pinnacle of the vast universe. To save the beings of this world, he undergoes five years of secluded training, breaks through to transcend the Saint rank, and joins forces with the Flame Emperor "Xiao Yan" and the Martial Ancestor "Lin Dong" to battle the Heavenly Evil God. Together, they eradicate the evil clan plaguing the mortal realm and purify the half of the vast universe seized by the extraterrestrial evil clan using the power of the world. Ultimately, Mu Chen succeeds in inscribing his full true name on the Firmament Roll, naming this realm the "Ruler's Domain," and stands alongside Xiao Yan and Lin Dong as guardians of the vast universe.