A long-history era of history is revealed, old allies are called upon, and a fallen king is rising. And it all started with the death of a single pony.
Thirsty for vengeance against Queen Chrysalis, Shining Armor leads an army south to deal with the Changelings. Prince Blueblood schemes for absolute power in Canterlot. And in the black north of Equestria, an ancient terror threatens to destroy all.
Equestria, desperate, trapped in a four-year aerial conflict against an enemy they can not beat, seeks an end to the war. Now, hundreds of miles from Equestrian soil, an attack on the enemy force is their last option.
An unwilling traveler of time and space, Twilight Sparkle becomes face-to-face with herself in a torn and dying Equestria forged from magecraft and industry, and haunted by the spectre of Discord's thousand-year reign.
Almost 200 years since the exile of the Nordic ponies after a civil war against Princess Celestia, a new ruler claims the throne. His younger brother, Dietrich Monetlius, a renown Nordic historian, grows weary of his brother's true intentions...