Both princess Celestia and Luna have been hiding a secret for over 1,500 years. Princess Celestia has decided that it is time to tell her faithful student Twilight Sparkle, along with her friends the secret. But what could it be that has made the princess herself kept for so long.

(Note: I will be making a prequel to this story. It will explain what my OC was doing within the 1,500 time period of the story)