After the events of the Canterlot Wedding, the Changelings regroup and plot a return. Upon their comeback, they successfully imprison every live equine in Equestria into cocoons within the span of a year. Nesting in the mountain next to Canterlot, the Changelings feed off of the thousands of ponies' love, claiming Equestria as their own.
Many years after their triumph, one pony escapes her cocoon prison through sheer luck, discovering Equestria to be a dark and barren wasteland of dead trees and no existing plant-life. Searching for any means of survival that she can find, the individual pony seeks a safe place to hide from the Changelings hot on her tail, knowing that if she gets captured again, they will put her back in her cocoon where she will be trapped for the rest of her life, dooming her kind forever.