In the mist shaded haze of the past, the world of Equestria teemed with wondrous creatures of every kind. Mysterious unicorns and hardy pegasi walked among tribes of earth ponies in relative peace and harmony - until the arrival of the demonic army known as Burning Legion shattered the world's tranquility forever. Now, Orcs, Dragons, Goblins, and Trolls all vie for supremacy over the scattered, warring kingdoms - part of a grand, malevolent scheme that will determine the fate of the world.
A terrifying upheaval among the highest ranks of the world's unicorns sends the maverick unicorn, TwilightSparkle, on a perilous journey into the Orc-controlled lands of Khaz Modan. What TwilightSparkle uncovers is a vast, far-reaching conspiracy, darker than anything she ever imagined - a threat that will force her into a dangerous alliance with ancient creatures of air and fire if the world of Equestria is to see another dawn.