After returning to the Changling Kingdom, Chrysalis learns about an unwanted surprise that had been growing side her. Something that would be a reminder of her failures in Canterlot, and a giant reminder that she had come to taking over all of Equestria. This foal had to go, not only so Chrysalis could keep her power, but also for it's own safety, but where in the world could she leave it...

...Ponyville