After dying from overwork, office worker Ye Chen transmigrates into the body of a fallen noble family's son in the mortal realm of the Xuanhuang World. From the start, he is hunted down. At the critical moment, he binds to the Myriad Heavens Devouring System, which can devour spiritual energy, demon cores, and fragments of laws to turn them into Devouring Points. These strengthen his cultivation, unlock divine abilities, and even let him analyze the weaknesses of all things and predict his opponents' movements.
With the System at his side, Ye Chen begins in the mortal realm, turning the tables on his enemies and restoring spiritual veins. He sweeps through Qingyang City with the power of devouring and rises to the top of the Wuji Sect. In the spirit realm, he exposes a scam involving false spirit veins, battles extraterrestrial fiends, and seizes an ancient source of devouring, becoming the spirit realm's acclaimed Devouring Venerable. Rising to the immortal realm, he establishes an alliance of rogue cultivators, exposes the conspiracy between traitors of the Tianyan Sect and evil fiends, and leads the allied forces against demons to defend the immortal realm. In the end, he is chosen as the Immortal Realm's Supreme Ruler. Upon reaching the divine realm, he resolves a crisis involving enforcers, allies with an ancient divine clan, and forms an alliance to defend the myriad heavens. On the day the divine realm's source emerges, he slays the World-Destroying Demon Lord and prevents an apocalyptic catastrophe.
From the Body Tempering Realm to the Immortal Heavenly Emperor, from a nobody in the mortal realm to the ruler of the myriad heavens, Ye Chen uses the Devouring System to consume the resources of the myriad heavens and fuse all laws into himself. He sweeps through the four realms of the mortal world, spirit realm, immortal realm, and divine realm, then holds back extraterrestrial fiend clans at the edge of the myriad heavens. With the words, "Those who trespass upon the myriad heavens shall all be devoured," he establishes an immortal order across the myriad heavens and begins the glorious age of the Devouring Heavenly Emperor.
