“Somethin’ tells me we ain’t in Ponyville no more, Winona.”

After being misled into drinking a mug of experimental tea in Twilight’s home, Applejack ends up jumping back and forth in pony history, and she doesn’t like it one bit. But the history books need editing: the stories aren’t following their original courses, and it’s getting worse with each century. Ponies are vanishing from their places in space-time. Now far away from home, Applejack just happens to fill a niche in a new discipline: time-travel rodeo.

With the guidance of Twilight Sparkle, who in turn is guided by Spike the dragon, who in turn is guided by a really snazzy Dewey Decimal System, Applejack must impersonate famous ponies from the past and re-enact the events that made Equestria history. It’s a tough job, but somepony has got to do it. Who better than ol’ reliable herself?

There’s just one catch: if she fails, Applejack will cease to exist.

With an assortment of astronomers, archaisms, after-eights, apothecaries, aardvarks, anti-ageing acid, atomic magic bombs, and – of course – lots and lots of apples.