Big Macintosh Apple is not a pony to mess with; an unwavering crimson juggernaut that can snap trees like tinder and rip homes from their foundations. Many ponies owe their lives to him, and more than a few denizens of the Everfree Forrest have found out the hard way that anything under his protection is strictly off limits.
But there is one race that has yet to learn this lesson, and is in fact incapable of it: the Zerg, a monstrous horde from far beyond the touch of Celestia’s sun, shaped by malice and warfare into perfect killing machines. That Equestria is safe from their reach is no small blessing, but every barrier has its cracks, and Big Macintosh is about to learn that even the smallest part of the Swarm is a force to be reckoned with.