Set after Season 4( which in this universe is after the events of the Hero Within)

The Chess Game - Part 1

What pony would want to travel in the most freezing weather since years? That is the question, that haunts Twilight's mind when she finds an almost completely frozen pony on her door. Meeting the new pony will certainly be interesting, but what is the guest hiding?

It starts more like as a " Slice of Life " story, but it and " Adventure" are confronting categories, so I couldn't tag it with both of them.