The Crystal Empire has returned to Equestria, and it's up to Twilight and Raising Heart to save it. Of course, the giant smoke monster, the nervous Alicorn of Love and the vengeful moon princess isn't going to make this easy. Can Twilight and her friends find the Crystal Heart and uncover the secrets of the city of Adamanetia in time? A side story to Magical Pony Lyrical Twilight.