Memorize. A company that has built an Empire on digitizing and controlling memories. The technology has been named Sen-sen and Equestria is addicted to it. Any-pony who dares to stand up to them faces total memory wipe.
But there is a group who resists these tyrants. The Errorists. Ponies who steal memories for the greater good.

Twilight Sparkle has had her memories stolen. With no recollection of who she was or where she comes from, the Unicorn must now travel back into the slums of Neo-Equestria to recapture her memories and take down Memorize, once and for all.