As punishment for her crimes, the Elements have cursed Sunset Shimmer to do favors for anyone who asks. Lucky her. And then there's that other Twilight Sparkle she keeps running into...
Sunset is getting fed up with her friends asking questions about Equestria suddenly. It's almost like they're planning for something... like a vacation.
Rainbow Dash promised Scootaloo a Rainboom at the next Wonderbolts show but she's been hurt. Solution: bring in another Rainbow Dash to do it for her! Two problems: Spitfire isn't fooled, and nobody taught the human Dash how to do a Rainboom.
Upon gaining access to the multiverse, some people go on fantastic adventures, rewriting history or exploring the vast unknowns of time and space. Twilight Sparkle had another idea.
Going on an inter-dimensional date with her marefri—sorry, girlfriend—was not supposed to lead to the existential crisis of a lifetime, but there was Rarity anyway.
Trixie appears once more in Ponyville, babbling about how she is supposed to be the Element of Magic and how Celestia is the evil Tyrant Sun. Has she gone insane? Or is something larger happening?
Sunset has had a sudden revelation regarding one of her closest friends and secret crush, and there's only one person, or pony, that can help her figure out what to do next.
Starlight and Sunset have the Trixies from the FIM and EQG universes meet up. Naturally, both Trixies have a competition to figure out which one of them is the Greatest and Most Powerful.
Maudie Pie needs advice. Maybe from a friendlier version of her younger sister. But what are the odds that one of those will appear? As far as Maudie knows, dimensional travel isn't a thing.
Cadance, Principal of Crystal Prep, takes a well-earned holiday. It would have been more enjoyable if Cadance, Princess of The Crystal Empire, wasn't constantly looking down on her.