After decades of conflict, the three pony races have finally united in a new nation: Equestria! Earth ponies Pinkie Pie and Minty decide this is a great opportunity to visit Unicornia and the fabled “Summer Sun Celebration” where the unicorn mages raise the sun for the longest day of the year. Along the way, however, a strange weather phenomenon hurls them (along with their new pegasus friend, Star Catcher) into an unfamiliar landscape. They come to a wondrous city called Canterlot, ruled by a pair of mysterious princesses.

(No time lords were harmed in the making of this temporal paradox.)