Spring Mist, night guard of Everfree, is in love with the night and forever loyal to Princesses Luna and Celestia. Yet in wishing to be more, he will happen upon a series of events that will change not only his own life, but the face of Equestria for the next thousand years. As Luna is seized by the Nightmare and transforms into Nightmare Moon, Spring Mist will be there as a piece of the puzzle. But what happens when the Nightmare begins talking to him?

Princess Luna's Lunar Stallions kidnap Twilight Sparkle when they see how lonely Luna is, and give her to the Princess as a gift. Nightmare Moon emerges from Princess Luna's psyche during the sleepover. The dark goddess would love nothing more than to have the beautiful mare all to herself, and the resulting chaos forces Celestia to call a psychologist to sort out Luna's multiple personalities.