An ancient promise shattered, a forgotten organization returned, and a threat held for centuries turned to actuality, a long ago established balance between Equestria and the forces held against it is broken. When a decision and a slip-up from the rulers of Equestria are deemed as final breaks of their word, the only option left for the princess of the sun and the princess of the moon are their carved in stone demises.

Knowing Their eyes are different and Their ways are the same as they have been since the beginning, Celestia and Luna are put on high alert as the end of their reign, and lives, are put on a timer. With The Elements of Harmony still lively and ready to stand for the princesses, six mares attempt to prevent the immanent. A race across Equestria's mysterious and dangerous borders begins as Twilight Sparkle and her friends try to stop the awakening of an ancient power. New forces will join The Spirits of Harmony along the way, some they would never have expected, and the struggling resistance against old foes will rise as Equestria is forced to defend itself.

But can Twilight and her friends save the princesses from those which were forged to rival The Elements of Harmony themselves?

(Contains adventure, dark magic, betrayal, spooky places, dark magic, badassery, violence, dark magic, swearing [limited], confusion, old and new enemies, and dark magic. Did I mention dark magic? There's dark magic. A lot of it.)