Harmony 16, the most controversial cosmic project that has ever been introduced by the royals of Canterlot, has hit a major breakthrough. After stumbling across the power to create wormholes, the equines on Harmony 16 are ready to launch Equis into a new age of space travel. Unfortunately, there is a downside.

The Weeping Angels have sensed this new power and are ready to conquer Equis's future through this new energy. The Doctor and Applejack must stop the Weeping Angels from succeeding, or else Equis's past and future will be at their mercy.