Princess Luna has been redeemed for over sixty years, and she aided Princess Celestia in leading Equestria. Time waits for no pony, however, and in these years most of the Elements of Harmony have died. Celestia is now forced to do what her sister did over one thousand years ago and come to terms with the frailty and aging on non-Alicorns. These terms once destroyed Luna and brought Nightmare Moon into the world. Can Celestia resist the temptations that took her sister all those years ago?