This story is a sequel to Soul Reclamation Society

The Soul Reclamation Society exists within the shadows of pony society. It's seemingly noble goal: to fill the holes left by ponies who have departed before their time. But there are many dark secrets in both their methods and motivations, and their founder, Dr. Fetlock, is still haunted by the shadow of the monster she unleashed on Equestria in her hubris.

(note: Reading David's "Soul Reclamation Society" is pretty much necessary. I mean, you ain't gotta, but you may be pretty lost if ya don't)