Secrets were a common theme surrounding the royals of Canterlot, however, by sheer coincidence, the act of a single mare, albeit unintentionally, will unravel these forgotten truths, unearth an old kingdom lost to the pages of time, reveal its sole living heir living right in the midst of Ponyville, and reignite a bitter resentment not spoken of since before the time of Celestia and Luna's rule. There is, of course, one glimmer of hope, and it comes in the form of a young purple drake with magic assumed to have been nothing more than myth and legend, and a claim to a throne once thought lost to time. The sole heir to a city, hidden beneath a lonely mountain.