After Lieutenant Hong mistakenly opened the Demon-Suppressing Hall, one hundred and eight evil stars from Tiangang and Earth entered the world. Heaven cannot take it back directly, it can only seal each evil star into a real human soul.
One hundred and eight hosts have their own personalities, desires and choices, and are not incarnations of evil stars. But the seal will push their lives to a fixed point, using death to consume the power accumulated by the evil star.
The entire late Northern Song Dynasty was closed into a cycle of tribulation:
