Once upon a time in the magical lands of Equestria….
The world above was poisoned. Equestrians fled underground to the Equestrian Transcontinental Metro, a massive underground rail system spanning the land of the ponies. The sister princesses, Celestia and Luna, are not known to have survived. With none left to lead the scattered ponies, lines were drawn and sides were chosen. Three large groups have dominance in the Metro. The Solar Army, The Lunar Guard, and the Crusaders. The Solar Army and The Lunar Guard are at war fighting over a reason lost to time. Hundreds were lost in each of their wars to end the other. The Crusaders, their founding also lost to time, chose neither side. Instead they try help the many ponies of the Metro. Few areas remain neutral, living on the fringe of an all out civil war. But darker forces are arriving to the table…..