Because they still have attachments to the human world, some of the dead refuse to leave and go to heaven to be reincarnated. Some souls that remain in the world carry resentment, attack people wherever they go, and absorb their victims' souls to grow stronger. That's when the exorcists who work behind the scenes have to step in.
"This is our job as exorcists, so could you please not come along? You two are making things really difficult for me." Looking at the blond and black-haired figures behind her, He Xi felt an unbearable headache. This was a job that involved seeing ghosts, so why were they following her?