Luna, sister to Princess Celestia, and Princess of the Moon, has been hiding a secret that she has kept from everypony, even long before she had been transformed into Nightmare Moon...
She has been killing ponies while they slept, taking their souls to who knows where...
What thoughts in her mind have clouded her sanity, and driven her to do what all ponies consider to be the most heinous and unforgivable crime in all of Equestria? What happens when she takes a loved one far too soon before their time, and her horrible secret is brought to light?