Idea for a short story
A journalist investigating stories of a haunting begins to suspect that the ghost is not a phantom of a dead person but of a living one. They think that an unhoused person living in a derelict building has been so thoroughly excluded from society that they have entirely vanished, becoming, in effect, a ghost. The investigator starts to examine this hidden side of the city more closely, discovered more and more of these hauntings that are, in fact, forgotten individuals, little more than the memories of a person. Unfortunately they become so drawn into their investigation that they lose all contact with their 'real' world, eventually becoming a ghost themselves, haunting their old place of work, no lonegr able to tell their story.