Equestria (and even Celestia herself) is falling victim to an ancient and mysterious evil. Twilight must learn what this evil is and how to defeat it before Equestria falls into darkness forever.
Man goes to convention dressed as multiple characters at once. Man purchases a Twilight Sparkle mask. Man regrets his decision as he ends up in a Pokemon-filled Equestria as another Twilight Sparkle. And then, something unexpected... Dawns.
As we all know; Rainbow Dash loves flying... Fast. She wants her friends to experience the awesomeness of flight and speed but she doesn't know how... Until now.