Head of a pony, body of a stag, tail of a lion, and the horn of a narwhal. These are the marks of a True Unicorn. A more beautiful and powerful creature you will never find. Truly, this beast must be a remnant of a time when gods walked the earth.
-Yellowdust the Alchemist

It was a normal day of practice for Twilight Sparkle until an encounter with an ancient and powerful being leads her on a search for answers that challenges the notions of her very existence. Along the way, she meets a strange mare who could hold the key to unraveling the mystery of the Unicorn.