For the majority of Ponies in Equestria, life was simple, calm, and relatively peaceful. Even when threats appeared, there was always the Princesses and the Bearers of Harmony that protected the land, nothing in the world, no matter how malevolent, seemed to compare against their power. But when giant, mechanical beings appeared from beyond the stars, it is clear that those days are coming to an end. Although the Princesses are among the most powerful in all of Equestria, the alien beings hold a power far beyond the understanding of the Princesses and are driven with the goal of harnessing Equestria's unique magical energy, either through diplomacy or outright conquest.

With these 'Cybertronians' arrival, the Ponies of Equestria are now thrust upon a new era, but is this an era that Equestria can survive? Or will the land be torn apart in the maelstrom that is to come?

(This is obviously an MLP/Transformers crossover, however the Transformers here are not based off a single generation, but rather I've taken aspects from several continuities, particularly from Generation One, Transformers Animated, and Transformers Prime to make a new Transformers universe for this story.)