Canterlot, the shining jewel of Equestria. The Sisters' seat of power, in the quarter century since Luna returned from the moon Canterlot has also become a beacon of the future. Enormous airships ply the skies over the city, connecting the capitol to all parts of Equestria and the world, while massive magic-and-steam-driven cargo liners propel trade and ponies across the oceans. It is an exciting time for Equestria.

An old threat, however, has returned. One by one, ponies are being replaced by the malevolent, life-stealing creatures called Changelings that attempted so many years prior to conquer Canterlot and Equestria. Can this menace be stopped, or will the city find itself in Chrysalis' moth-eaten hooves after all?