First of all, a note on the rating: There is nothing explicit in this fanfic. If you could read it in Shakespeare, then you can probably read it in here without any problems. I'd just rather be safe than sorry.
Having been a brony for about a month and a half, I've come to find out quite a bit about the community. One of the most interesting current issues is the banishment of Luna by her sister, Celestia. Some see Celestia as a tyrant; others see Luna as the evil counterpart. The goal of this story is to explain the internal and external factors which caused both sisters to act how they did, and explain that neither is a monster, but a victim of factors.