Now retired from being a princess, Luna is free to pursue her interests: Chief among them reading. So imagine her surprise when she stumbles across a book written by none other than Stygian, a book specifically recounting the story of his past as The Pony of Shadows.
Naturally, Luna is quite intrigued by such a story and feels that she has a connection with the former scholar. So she decides to pay him a visit and have a little chat.
Stygian, for his part, is always thrilled to talk with fans of his work. But little does he suspect that Luna and him will share in some very personal feelings, feelings about the past and how it can shape one's present and future. As well as what it truly means to have once been "evil".