Why do Alicorns exist? What purpose do such powerful beings hold in this world? As the newly crowned Princess of Magic, Twilight will soon learn the answers, as well as the unimaginable weight of responsibilibty that comes with such a title.

Princess Luna feels as though she lives in the shadow of her sister. Always outshined, and never appreciated for her gifts. But what happens after the very first summer sun celebration will change the history of Equestria forever.