Secret Lore has always dreamed of being able to fly, and ever since he saw Twilights magic explosion at her entrance exam, as a teenager he has dreamed of doing magic as well. But he is just an earthpony and earthponies are supposed to use their hooves, not their “thinking thing” as his father used to say.
Yet Secret has only one dream, to study alicorn in all its form, and to unlock its secrets.

And alicorn as we all know is a substance of crystallized magic first, the name of a unicorns horn that is made of that substance second, and the name of a unicorn with wings third (just so there is no confusion).

Rainbow Dash Princess of the sky, is the youngest of Empress Celestia’s two daughters and the runt of the family. When her fillyhood friend and protégé of her mother, the highborn unicorn lady Twilight’s concern for the myth of Nightmare Moon, and her imminent return is brushed of by her teacher, she is asked to attend the summer sun celebration in Ponyville along with the young alicorn as its overseers.
But is Celestia really the benevolent monarch that see appears, and what is the truth about her dark sister, the mysterious princess of the night?