Twilight Sparkle and her friends have finished a 2 year war between Celestia's army and Trixie's. The 6 trot back to Celestia's castle. She gets caught with Changeling magic and gallops into the woods to find the source of this magic attracting her. She finds 3 Changelings who bow in respect of her presence while they shout out prophecies. Along the way back, Twilight thinks about these prophecies and find out that Luna has been murderd. Twilight is now the new Princess of the Moon, this was part of the Changeling's prohpecy. Along the way, plots and tragedies will unfold to really explain why this is the tragedy of Twilight Sparkle.