Sunset Shimmer has returned to Equestria, by special request of Celestia. Celestia wants to make her former pupil an offer. A chance to turn back the clock, to take back a moment that they both, dearly regret.
One of the things they never tell you about becoming immortal is how many funerals you have to attend. At long last, Discord has to face the mortality of his first and closest friend.
Sunset Shimmer has overcome her own demons, saved the world more than once, and made up with her former mentor. But now she must face her greatest, and most dangerous challenge yet: meeting her girlfriend's parents