In an Alternate Universe, Celestia descends into madness and turns into Solar Flare.

However, moons before this all had happened, Princess Luna received an omen of Celestia. In it, Equestria was slowly burning in flames from the scorching sun, ponies and animals dying from lack of water. Above it all, Celestia watched.

She even foresaw another character in the omen. A purple unicorn stood in the flames, never giving into the despair of the heat of the sun.

Now, Princess Luna searches all of Canterlot for the purple unicorn behind her maddened sister's back.

This story was inspired by this cover.