When Twilight and Applejack explore a mysterious cave on the edge of Sweet Apple Acres and things go awry, they are quite literally swept away into a world of darkness and ancient secrets. Inspired by DuoCartoonist's Children of the Night.
Whose fault is insanity?...Could somepony ever lose themself within their own mind? Could they become only a figment of their own imagination, a wisp of a memory drifting in an endless abyss? And most importantly...why?
Puzzle Master (kind of like a Prof. Moriarty pony, on crack) decides to have a lovely spot of tea and a chess game with his buddy Discord. This can only end well.
As the Elements of Disharmony seek out wielders among the fallen and redeemed villains of Equestrian history, the Wielders of Harmony must prepare for the coming storm.