It has been two hundred and twenty years since the world was destroyed in balefire during the events of The Last Day.
Following the Day of Sunshine and Rainbows where Littlepip and her friends saved Equestria from chaos and despair, the New Canterlot Republic has been struggling to rebuild Equestria from the ashes of the Great War. From the start the fledgling nation has been beset from all sides by many foes. While Equestria fought to rebuild itself, in the former lands of the Zebra Empire, a new Caesar had taken control and brought the old lands back under his control. Now Caesar seeks to finish what was started all those years ago, setting his sights on Equestria.
While the NCR deals with threats both internal and external, deep within the earth inside Stable 111, Lieutenant Chrome Alum awakens from his over two century long cryogenic sleep to find a world far different than when he went to sleep. Following an old decayed message from his Prince, Shining Armor, he emerges into a world of chaos that will seek to involve him, whether he wants it or not.