Up in the frozen north of Equestria lies Base Forty-One, an Arctic base that was created after the Canterlot Wedding to insure no changelings can get through to the more populated areas of Equestria and suck the love there dry. The four guards stationed there are about to ask one question: Who can you trust when there's a changeling in your mists?

Loosely based off of the short story Who Goes There? And the movie John Carpenter's The Thing. (When I mean loosely, I mean loosely. I have never seen the movies or read the short story, but I do know the basic premise.)