My name is Sunset Shimmer, and I wanted to speak to the human Twilight about a closely guarded secret. I have a journal... one that contains secrets... personal secrets about my life from past to present...secret feelings about my friends...
Sunset Shimmer must save Termina, a parallel world to Hyrule on the verge of ruin. By her side is her friend and mentor, Princess Twilight Sparkle. Can Sunset overcome the odds stacked against her?
A murder in the mirror world brings Sunset Shimmer back to Equestria, with her world's Twilight Sparkle in tow. While they track the killer, they struggle to reconcile the differences between them and their mirror counterparts.