After death, the weight of the soul is 21 grams. It will dissipate after seven days, and no one knows where it has gone. But some souls shouldn't stay. Someone wants to use these 21 grams for experiments. The experiment failed. They opened a door they shouldn't have opened, and the door never closed. From then on, the soul with too deep obsession will no longer dissipate. Xie Wei guarded the seventh place and made a living by handling these things. He also has this power hidden within him. He was waiting for an answer.
