When Twilight heads to Canterlot to get the life story of Celestia and Luna, she had expected to get it from the source. But when Celestia proves she's not a reliable witness to her own life story, somepony- or somedraconequus- may turn out to be just the source Twilight was looking for. Which may not turn out to be such a good thing when Twilight learns some things about her role models that she wasn't mentally prepared to know... Hints of Dislestia, but not enough to be considered shipping.