What would you do if you already had everything? Or everything you wanted. Her Majesty Nightmare Moon has recently discovered there is more to life than war, intrigues and edicts. Luna is trying to be helpful. She has no choice.
What first started out as a simple dare turns into a hellish nightmare as these groups of students find out the hard way that some things should be left untouched.
Rockhoof has returned to Equestria after a thousand years in Limbo. He's also severely depressed. Princess Luna pays him a visit in his lonely dream to find out what troubles him.
Where did Celestia disappear to, the night of the 1,000th summer sun celebration? Why didn't Nightmare Moon simply kill the mane six? What was The Nightmare willing to do in its hatred, and The Princess willing to do for her beloved little ponies?...
Despite that everypony has forgiven her, Luna still lives with the guilt of her actions and it eventually builds up too much for her to live with. Worse, guilt is only part of it.
Celestia has a dream about Nightmare Moon, while Luna can do nothing but watch her sister's nightmare. When Celestia awakens, the two sisters talk about what they've just seen.
How could I have told you Celestia? How could I have explained to you that your beloved sister was now more damaged than she had been when she first returned? That her brief lapse into Nightmare Moon had left her so unimaginably broken?
With the help of her friends in Ponyville, the Tantabus was subdued...but what about Celestia? What about Luna's closest friend, a pony who had no idea what was going on in her little sister's mind?