A Leviathan crashes and embeds itself deep within the Western Equestria Mountain Range. Pretty soon, portals start opening up around the land, and the wicked terrors that lie behind these portals, is beyond words.

The Ing.

And now, it's up to Twilight Sparkle, Rainbow Dash, Applejack, Rarity, Pinkie Pie, and the Aetherian Space Pirate Grenadier Gradis Magis to fight off these Darkling monstrosities. Only one problem, not only do they have stolen equipment from their last enemy, the Luminoth, they've also adapted themselves to light. Can the five friends prevent these malicious beings from draining Equestria of all energy to fuel its Ing-infested doppelganger? Or will the Ing rise, and defeat the ponies, once and for all.