What would you do, if you met a pony who was at once your brother, and yet not? Applebuck wishes to reunite with his 'Cousin JayJay', and braves the dimensional divide to reach his goal. But being a small foal, how will he deal with a world in which everything is flipped? His friends, his family, and even... himself?

Twilight and her five friends are transported during a botched spell, across dimensions to... Ponyville, Equestria? But not the same one that they knew. Sitting on a bench is Harpsy and Babar. The Doctoress avoids apples from an aspiring Applebuck. And in a library across town, six stallions join their forces as they try to decipher the appearance of filly look-alikes of themselves around Ponyville!

"Once upon a time, in the magical land of Equestria, there were two regal sisters who ruled together and created harmony for all the land. To do this, the eldest sister used her unicorn powers to raise the sun at dawn. The younger brought out the moon to begin the night. Thus, the two sisters maintained balance for their kingdom and their subjects: all the different types of ponies.

"But as time went on, the two sisters grew greedy and covetous of their neighbors to the north. The Crystal Empire stood ready to defend themselves, but even their prince, noble and kind, could not contend with their power. On the fateful day they turned on their once friend, they became the ultimate perversions of their former selves. The elder sister became Solaria Dawn, herald of light and hate, and the younger became Night Mare Moon, harbinger of darkness and fear.

"Reluctantly, the noble prince delved into the darkness and found the forbidden powers needed to save his empire from certain doom. With the might of the shadows, combined with the mystical strength of the crystal heart and the elements of harmony, he was able to defeat his former friends and bring peace to all of Equestria, bearing the responsibility of both sun and moon. Harmony and peace once again fell upon the lands.

"One thousand years has passed since that time..."