This story begins a few weeks before the events of Ghosts of Whitetail Wood and continues forward past the ending of that story. Celestia is confronted with the fact that her faithful student has managed to break the fundamental laws of the universe. If left uncorrected, there's a good chance that the universe itself may unravel. The obvious answer is to kill Twilight Sparkle and all of creation is conspiring to eliminate her as a threat. Celestia has other ideas.