Who knew that a long kept secret could come back to haunt you. Apparently that's to be expected, but in the case of Celestia and Luna's dark secret, it is an entirely different matter on its own. Applejack will learn more about honesty, along with her friends learning how to stop an ancient being. How far will everypony have to go to end the madness? Very far. With one pony in particular learning a secret her own family has been holding on to for some time.