before Twilight became Celestia's Student, and after Sunset Shimmer left though the mirror, the Princess was plagued with the century old guilt of what she did to her sister Luna, but now her past has finally caught up with her and enveloped the town of Ponyvill in its dark malice, can the Princess stop the insanity from destroying her kingdom, or will she be consumed by the flames of this living Nightmare

this is a separate story from the Silent Ponyvill series you might be used to so be warned