Equestria has always been a nation of harmony and friendship, founded on these ideals long before even Celestia and Luna came to rule the ponies which resided there. As with all nations it has faced troubled times, times when the elements which founded it were put to the test, but always pulled through.

However, the history of ponies was not always as it now is. Ponykind rose in strife and fear, a time long since forgotten by those ponies who live now. When a piece of this past returns to the world of ponies, the harmonious nature of Equestria disgusts it, and this mysterious evil will stop at nothing to return ponydom to it's once horrific and fearful past.