In the Battle of the Gods, heaven and earth fell. Gonggong's anger touched Buzhou Mountain, the pillars of the sky were broken, the earth was broken, and an unbridgeable abyss opened in the sky. Nuwa refined five-color stones to mend the sky and exhausted her magical power. In the end, she was unable to completely bridge the gap because she lacked a ray of "love soul". The soul stone that could not be put into the sky fell into the mortal world and traveled for thousands of years.
The way of heaven is slowly being torn apart, and the three realms are out of balance. The one hundred and eight demon stars in Shuibo Liangshan were originally the evil spirits of Tiangang, but they escaped from the mortal world due to the crack in the sky; the demons who were supposed to be saved in the Nine-Nine Eighty-One Dilemma on the westward journey caused chaos again due to the imbalance of heaven.