Princess Luna was surprised at how different she appeared when she was freed from Nightmare Moon. But it has surprised her even more how similar things continue to be between she and everypony else, especially her sister. With a child's body and a child's mood, she struggles to feel secure in an environment she thought she would always be sure of. In this swirl of emotions, Luna finds solace in the pages of an old romance. Its words, however, inspire a truly mad idea. And Shining Armor, bound by his oaths, must see through this madness 'till the very end.