One thousand years ago, Nightmare Moon triumphed over Celestia and plunged Equestria into an era of darkness.

On the outskirts of the great city of Cloudsdale, Rainbow Dash struggles to provide for herself and her only friend, Fluttershy. Her mundane if uncomfortable existence, however, is thrown into chaos when she finds herself arrested for theft and treason.

When Nightmare Moon sends her personal student, Twilight Sparkle, to aid the investigation, things rapidly spiral out of control as events that will change the fate of Equestria unfurl.