It has been half a year since Twilight was crowned as Princess of Equestria, half a year since she and her friends had given up the Elements to save the Tree of Harmony.

Now Canterlot is under siege by an alliance of Griffins, Changelings, and Dragons who are determined to end Equestria once and for all. With the elements no longer available, the safely of Equestria lies on Pinkie Pie and Discord… and the next generation of princesses gatling guns.

Will Discord and Pinkie save the day? Will Celestia, Luna, Cadence and Twilight have enough fire power to repel the invaders? Only time will tell.