When Twilight becomes obsessed with the idea of perfect harmony, she begins researching ancient spells found within the Two Sisters Castle. Ironically, she messes up the perfect spell.

What is perfection? Is it the boundary beyond which all is flawless, without change?

What if change didn't exist?

What if some clever pony decided to get involved far deeper than she had any right to?

What if the pony didn't exist?