Fluttershy was born on some of the highest clouds, but during her life she discovered that ground was where she belonged. However, there are aspects of her life in the sky which she cannot break from completely. And now, they're coming back.

Her parents are coming to Ponyville to visit.

In the cold north of the Crystal Wasteland, Stable 46 has thrived despite the horrors, acting as a trading post into the Crystal Wastelands from Equestria. But when Twilight Twinkle chooses to leave her life of relative comfort to step into the frozen wasteland, she doesn’t know just what she is really stepping into.

But there is something else stirring in the Wasteland. Something which is slowly casting its shadow over the frozen north and beyond. Something which is older than Equestria itself.

And, unknown to Twilight, she is setting herself up to walk right into its heart.

Credit to the original story goes to Kkat. Her legendary fic can be found here and here.