When Twilight Sparkle gets to finally spend some private time with princess Celestia, she asks her a lot of questions she had on her mind for a long time, including some about the origins of Nightmare Moon.

Will she get her answers? Will they be what she expected? And what does princess Luna have to say about all this?

(Updated as of 3-7-12. Probably not enough for a re-read. Thanks to Professor Hugbox for his review.)