It begins with several small things: A filly, a scroll, and a smartphone. However, Equestria soon finds itself catapulted into a larger world, a world where everypony else had spent the last thousand years innovating both magically and technologically. A world where smartphones and 3D printers have existed for centuries. A world where powerful wizards consider death a temporary inconvenience, and who can utilize magic on a level far beyond anything any pony had ever imagined. A world... where earth ponies use magic more masterfully than any unicorn that ever lived... or alicorn currently alive.
Equestria is now far behind the rest of the world, and will have to catch up... and quickly, because while the ponies of Equestria do find themselves with new allies, they now also have new enemies, ones who would consider the annihilation of Equestria as a stepping stone towards grander ambitions, and consider unicorns and alicorns as amusing novelties, instead of wizards and demigods...