After an incident between Applejack and Rainbow Dash, the two are finding it hard to communicate with each other. However, a trip suggested by a friend might bring their problems to light.
Summer vacation has arrived in the human world and Sunset Shimmer takes a trip back to Equestria. However she comes back to something more than she bargained for.
When one fateful search through the Everfree Forest leads Rarity to a secret library inhabited by the spirit of an ancient alicorn princess, she realises that it may be time to start believing in fairy tales.
As an ancient alicorn trapped inside a library, Princess Twilight spent many a century dreaming of being rescued from her prison. Now, finding herself in an entirely new Equestria, she realizes she'd never planned for somepony to actually succeed...
Twilight takes her duties as Princess Rarity's bodyguard seriously. Unfortunately for her, it's difficult to protect a princess in a sea of costumed ponies when you have no idea which one is actually the princess.
When a terrible misunderstanding leaves Princess Rarity with the terrifying prospect of missing her bodyguard's birthday party, she decides that nothing or nopony will stop her from celebrating Twilight's special day.
Life is like a train ride, don't you think, dearest? Destinations will change, trains will be caught and missed, but there will always be somepony willing to journey with you—so long as you let them.
Sunset Shimmer is lost in a world that she can't move on from. Twilight Sparkle is lost in a world that moves on without her. Together, they each try to find their way again.