Having cultivated for over six hundred years, Dao Zun Zhou Xu, revered by all sects, finally returns to the modern era. But on the seventh day of his return, he is once again dragged into the Myriad Demons Apocalypse centuries later. Demons devour cities, and futuristic armed forces track him down; the once familiar world is already unrecognizable. Zhou Xu uses max-level immortal arts to save people and slay demons, only to discover that a centuries-old archive has already marked him as Disaster Source Zero. Who recorded him before his arrival, and who wants to use his boundary-breaking ability? From modern streets to future ruins, he must follow the clues left by cross-time pursuits to uncover the source of it all.