Twilight is being tormented by sorrow and guilt, she never intended to petrify her beloved teacher, but there was no other choice left, or was there?

At the same time Discord broke free from his stone prison, because the power of the elements have weakened, but why? And how are they going to stop Discord from taking revenge against Celestia?

This story plays in the same world as "Rainbow's Burden"

You do not have to read the story to understand the plot, but it can't hurt to know what happened in more detail, can it? ;)

http://www.fimfiction.net/story/1019/A-rainbows-burden