On the moon there is a message addressed to the mighty Princess Celestia. This message is engraved in the eternal dust of this barren desert of nothing, and within this eternal dust, are listed the past sins of the powerful Princess, written by none other than Nightmare Moon herself.

There is a secret organization that specializes in the capture and containment of Non-Equestrian entities that threaten to disrupt or damage the peace of Ponyville, Canterlot, and beyond. They work on a don't-ask-don't-tell basis, and have been working behind the curtain of everyday life keeping the ponies of the world safe from ghouls, goblins, and ghosts not of their world. These are their stories.

I was just trying to escape the voices. I tried everything in my power to get rid of them. And now I've sent myself to another world entirely. A beautiful, peaceful world. How, I'm unsure. But with my arrival came something far worse than the voices. Something that could consume everything in sight. I've endangered everything here. I'm terrified of it. I can't look at it without passing out. But I'm the only one who can destroy it. I have to destroy it. I will destroy it.