There was no doubt in Sunset Shimmer's mind that as Celestia's personal student she was the most powerful Unicorn in Equestria, bar none. But between the arrival of 'Princess' Cadence and Celestia's dismissing her for prying too deeply into Starswirl's Mirror, you can hardly blame her for being a little desperate.

Now trapped in another world in a form not her own, she'll be forced to learn the hardway the lessons Celestia so desperately wished for her to learn. Fortunately, there's more to her new friends than meets the eye.