The White Reach is a frozen wasteland far removed from the bastions of civilization. It's in this cold abyss the world's ley lines of magical power converge, blurring the lines between realms and causing spells to be unpredictable. It's generally avoided for it's unforgiving environment, but with magic suddenly and rapidly fading from the world, it's the last place magic users find their spells still work!
Whatever has caused the recent magic drain seems to have originated from this place, but scholars can only speculate. Without magic to aid them, no one really knows what's happened to cause the crisis. They've turn to the PCs to investigate - sending them to the frigid depths of the White Reach on a mission best served cold of monstrous proportions!