The universe is divided into two realms, each in opposition to one another. The outer realm is ruled by demons, whereas the inner realm encompasses the Realms of gods, Eternal, and Mortal. The Jiutian Xin Region contains innumerable mortal worlds, including the Tianfa Continent. At the core of Jiutian Xin, nine immortal emperors govern all star fields across nine tiers. Above the nine skies lies the purifying realm of immortal gods.