Because of Anon-A-Miss Sunset is abandoned by everyone, so she decides to start a new life, among shadows, she will seek happiness, but what will happen with the magic of friendship?
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.
The book was Twilight Sparkle's greatest creation – ask it any question about how your life might have been and see the answer. It is a work of genius. It is a tempting, insightful, wonderful marvel of magic. It is a terrible mistake.