Mr Turner was always fascinated, not only with Time Travel, but also exploring the many Worlds the Multiverse has to offer. His dream would finally come true when Princess Celestia tells him that Queen Chrysalis is rebuilding her Changeling Army in an entirely different Universe to their own. Not only that but a certain Princess of Friendship and her Dragon companion get roped into coming along with him on a Quest to an entirely different World and its history that has never been explored before by Pony-kind.
That world?
Ours.