Canterlot is experiencing an unusually humid summer. With the extreme humidity comes a thick fog that rolls in from the ocean. The fog makes the town look very spooky at night, and it isn't long before old ghost stories start to resurface.

One night, Applejack gets lost while driving home and sees something strange and disturbing near an old, dilapidated guest house deep in the woods. Are there ghosts on the loose in Canterlot? Or is there some other explanation?

Based on "Ghosts", one of my favorite TUGS episodes.