This is a sequel to Whiteout because the author abandoned it so I decided to take it into my own hands.
Whiteout 1 https://www.fimfiction.net/story/158287/whiteout

Devon hadn't exactly been the most level headed to begin with, and waking up in a foreign city in the dead of winter with no recollection of how he got there wasn't doing him any favors. If that wasn't enough, he's also stuck with Alek, a disembodied voice that only he can hear. Can the pair manage to work together long enough in order to uncover what happened to them, or are they already a lost cause?

It sure would be a lot easier without hooves too...