A human who has been converted into a pony is losing her mind. Or so she thinks.

Day by day, her memories decay. She's convinced that one day she'll become a near-mindless newfoal, like the former humans created from the Ponification Potion and used as shock troops by the Solar Empire. And so, as the Solar Empire encroaches on the world, she hides in a small town...

Until she is told that the only thing that can reverse her mind's degradation is to find her purpose, to anchor her self. With this proclamation, she travels through a world on the brink of social collapse in search of her cutie mark.