Who Let The Ghosts Out?

ONC 2021 contest prompt 64

What should have been a simple task for a trio of ghosthunters becomes something for which the term "Worst Case Scenario" is the mother of all understatements.

Sandra, Amelie, and Candice are the three tough women who run "Third Eye Investigations". Recently, ghosts have been popping up everywhere, providing a great business opportunity for clever people with the right skill sets.
Ousting a bunch of ghosts from a chocolate factory?
Piece of cake.
Perhaps, the simple fact the guy commissioning the job was called Borgia should have warned them.
Well, it didn't . As a result, things went south so badly, the three are now dead, banned to an underground morgue, while the world is hurtling towards Ghost Apocalypse.
There is no way out of the chilly drawers. Unless they do the impossible.