Ten thousand years ago, Ye Tian was just a high school student—until a fateful surgery hurled him into a world of cultivation, where he became the feared Heavenly Demon, a name cursed by immortals and dreaded by demons. After countless lifetimes of slaughter and a desperate struggle against the Heavens themselves, Ye Tian finally returns to his former world... only to find it is not what it once seemed. His arrival triggers a global awakening—unleashing mysterious powers, mutating animals, and driving humans mad. With society collapsing into chaos and zombie-like creatures roaming the streets, Ye Tian’s quiet reunion with his family is shattered. Faced with a new kind of apocalypse, he must once again awaken the Heavenly Demon within to protect those he loves and uncover the dark secrets that bind both worlds. Will Ye Tian reclaim the life he lost, or will he lose everything once more?