Partway though her second year at CHS, Sunset Shimmer unexpectedly learns she's been appointed a princess of Equestria.
Also, her old homeland needs her to return immediately.
Prereaders of all or parts of the story: Kirtai, FanOfMostEverything, JP, Shirlendra, EileenSaysHi, Carlos S., Secret Artichoke, (I think I got everyone, but if I left you out, please send me info I can use to confirm.)
Art notes: I made the cover image by editing MLP comic panel and show art.