Twilight and Celestia go off alone, and Twilight will not say what is the matter, only that she may not return at all. Her friends and Luna gather in a vigil at the library the night of the Twilight's unknown trial, waiting for her to come back to them. Twilight faces the most terrible of all decisions, and learns the nature of what she is, and what hopes she may yet have when the sun rises and she returns to her friends.