The end of the world is sometimes a quiet affair. After a mysterious aurora derails their train, Applejack struggles to find Twilight, uncover the mysterious mission they were on, and survive in a new and peacefully malevolent world.

Head of a pony, body of a stag, tail of a lion, and the horn of a narwhal. These are the marks of a True Unicorn. A more beautiful and powerful creature you will never find. Truly, this beast must be a remnant of a time when gods walked the earth.

The changeling attack on Canterlot was just the beginning.