As mainland Equestria suddenly and without warning reappears on the map, the old government in exile calling itself The Princedom Of Greater Equestria is thrown into a crisis as their ultimate goal of reclaiming old glory is now within reach after thousands of moons.

What will happen when new and old inevitably collide? Shall Equestria be thrown back into the fires of war that once already tore it apart, or can a group of unlikely allies stop the madness before it is too late?