When Luna returned after a thousand years of exile, she brought something else back with her. Dreams – real dreams – are shaking the world, and Twilight Sparkle must stop them before they destroy it.
There is an unknown fact that Luna had been hiding about herself : She has been killing ponies in their sleep. What could the reasons be that drives the Princess of the Moon to do this? What will happen when her dark secret comes to light?
Where was Luna during the attack on Canterlot? Why did she not aid her sister in protecting the city? Perhaps she was protecting other ponies... or perhaps something more sinister occurred.
As the details surrounding the Canterlot Invasion don't add up, Twilight investigates the suspicious disappearance of a guard during the attack. Just how did Chrysalis manage to sneak so deeply into their ranks?