After the Battle of Canterlot, there were many wounded, and the worst of the wounds were not of the body.

Twilight Sparkle, of the human world, was left comatose and stricken by her saturation in dark magic. Zee, her lover, was not much better off, left bedridden and half-crippled by the backlash of her possessing spirit's death, and by the state of her loved one. Rainbow Dash and Lightning Dust were remanded to the custody of Equestria itself and placed in the care of an enigmatic 'specialist' of mind magic to repair the damage done by Midnight Sparkle during the battle.

Two years later, the girls have been back for a time and are fighting their way through the Mojave desert carrying a valuable package and a desperate hope. A hope that from the darkness they might bring their friend back home.