The Lunar Republic has been around for just over a hundred years now. Nightmare Moon's assassination leaves Emperor Midnight in charge of the empire. There are rumors of a rebellion forming, which brings hope to the weak and miserable ponies of the Republic, but little do they know that the rebellion is already far underway.

Emperor Midnight orders a bombing on the city of Canterlot, which is known to be the home of this rebellion. Unfortunately, the leader of the rebellion himself, Shining Armor, is lost in the attack. Now his sister, Twilight Sparkle is sent to defend the last standing city of Equestria, the Crystal Empire, with the new leader of the rebellion and six other ponies she has befriended.