Ning Yechen transmigrates into a world of immortals and martial cultivation, becoming the new Demon Venerable. Tired of a world filled with endless fighting and killing, he retreats into seclusion in the human realm. One night, an Empress from the Immortal Realm is poisoned and falls into the human realm, landing in his room. Through an unexpected twist of fate, the two spend the night together. Afterwards, the Empress quietly leaves without a trace. Four years later, she arrives before Ning Yechen with a little girl and demands that he take responsibility. On the surface, Ning Yechen is a doting father, but in secret, he is the supreme Demon Venerable. He helps the Empress deal with cultivators hunting her down, crushing every opponent along the way. With displays of overwhelming power and satisfying comebacks, and through his interactions with the Empress, he becomes the supreme Demon Venerable who conquers the Immortal Realm, destroys the gods, and unifies the Six Realms.