Princess Celestia is grateful that her dearest sister will finally know peace after her centuries of banishment but is surprised when events turn out differently than expected. Worse than that she is tormented by the return of somepony she had long buried.

Will she be able to find it within herself to forgive her sister for all she has done? More than that will she be able to ever forgive herself for all she has done or will she be destroyed by the memories of the pony the once loved?