Twilight is full of apprehension as she approaches the first Princess Summit. But no one expects that she will soon be fighting for her life and her people, beneath the falling sky of an alien world...
Sunset Shimmer journeys to Northmarch to meet the ancient dragon Argentium the Runescaled. Her dreams of becoming an alicorn clash with a threat that may require sacrifices—not just for her dreams, but survival.
Displeased with her mentor, Sunset Shimmer looks for a new option, she finds it in a Mirror Portal, deep in the vaults of Canterlot. Together with Philomena, she sets out on a journey. Two worlds of magic will be changed forever, by a small error ...
When Sunset sees herself as an alicorn in a magical mirror, she goes looking for answers, eventually going through the mirror into another world. Some things are better left alone though, as she finds herself trapped in the other world as a child.