For centuries, the three Princesses have protected their land for devious forces known as "The Dynasty of Misery". A force that consist of three chaotic ponies that desire to rule Equestria, dividing all the ponies by ability. That ability is Magic.

(This takes place in the future, a future where Applejack, Rainbow Dash, Pinkie Pie, Fluttershy, and Rarity have had their children, grandchildren, and even Great grandchildren. Please take a wild guess as whose kids are whose.)