Something is coming. A terrible, unspeakable dark is poised to swallow the world and all who inhabit it. The Royal Sisters have seen it, and know that neither they nor the Elements of Harmony have the power to stop it on their own. They need a guide. They need a seer. They need a pony who has come back from the shadows with his mind still intact. If they can convince him to join them, they may have a chance. Unknown to the Elements, the Royal Sisters suspect this pony is actually the cause of this coming darkness. Is he still the pony they knew, or has he succumbed to the shadow?