Time at the spa isn’t something Moondancer would consider to be an effective use of a day, but when one is given a coupon, one doesn’t look a gift horse in the mouth.
Sunset Shimmer, in Equestria, Has to deal with being a part of Twilight Sparkle's team, per her request, despite her own feelings of inadequacy, regrets, fears, and worse of all, her newfound love for Twilight Sparkle. Can she ever earn it?
Sunset finds herself a bit surprised to see a stuffed shark on Twilight Sparkle's bed, and a bit more surprised Twilight's uncomfortable talking about it.
As kids, Twilight and Sunset were best friends, but a tragic accident cut their friendship short. Years later, Twilight investigates the incidents at Canterlot High and comes face to face with what appears to be a literal ghost from her past.
It turns out that Sunset Shimmer's final letters to Princess Celestia before her exile were not filled with resentment or remorse. There might have been a lot more frantic running away involved. But it was definitely not Sunset's fault. At all.
Principal Celestia always has wings in her dreams. So when a magical clash in front of her school sets her phantom wings to itching, her life turns upside down. And she hasn't even heard about Equestria yet.
Sunset Shimmer really did not expect to wake up several years in past before she left through the mirror. Now she'll have to make due with her new reality, as well as two pestering princesses that won't leave her alone.
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.