The Plane of Shadow is a cold, grey place that exists parallel to our own world, a perfect balance between positive and negative energy leaving a dull realm in which colour is quickly drained. Langley til Astray found herself in this place trapped in this place some unknown years ago when an arcanist hired her and several others to scout out this world and record various facts with delicate equipment provided, that he might gain greater understanding of that world and the magic that was linked to it.
At first everything went as planned, no mishaps during the process of shifting from the Prime Material to the Plane of Shadow, and for the first few days everything went fine. Food seemed to be common enough there, it was simply a much less colorful and overall darker version of our own world, grey fruit hung from trees and dark variants of game prowled the wilderness. After the pre-arranged time had lapsed, and the days passed, it was clear that the portal home wasn't coming.
Slowly the essence of the plane began to seep into the equipment and bodies of the expedition, staining their clothes grey as the landscape, and stealing away the colour from their skin and hair. Time passes much differently on the plane of shadow, allowing those who travel through it to seemingly take no time at all to teleport or "jaunt" distances on the material plane, and it was because of this time difference that when a group of adventurers came across an old abandonned wizards' keep deep in forgotten wilderness and activated an ancient device, the expedition returned to a world much different than their own. While several years had passed inside the realm of shades, several hundred, possibly a thousand had gone by in the Prime Material. Empires had risen and fallen, fashions had certaintly changed considering the differences in clothing those that freed them wore.
And so the expedition could finally go their seperate ways, there were of course those who stuck together due to bonds fashioned in the Plane, or due to a new family that exchanged their vows and conceived in the grey world. Langley herself set out to explore what the place had become in her absence, eventually hearing of troubles near a place called "Targas".