Everypony knew the story of the "Mare in the Moon", some ponies knew about Discord, yet nopony knew about the Rebel Alicorn, Astraea, well nopony but the Princesses. Celestia locked her up after Discord's imprisonment in stone for a similar reason to why Luna was imprisoned within the moon, evil.

Just when Celestia thought she would never have to deal with any more evil, Astraea broke free of her prison. Now she is sending the most skilled unicorns and pegasi in all of Equstria to capture the evil Alicorn.

But one question pounds within their heads:
Is she really as bad as everypony thinks?

Twilight Sparkle was practicing a new spell. To her (and everypony else's) shock it went horribly wrong. Everypony turned into humans! Now Twilight and her friends must find out how to reverse the spell, and fast, otherwise it becomes permanent and they will never be able to return to their pony selves, ever.