After losing the Elements of Harmony in order to save Equestria, Twilight has been haunted with nightmares. There's only one pony who can help the scared Twilight Sparkle, and bring her away from her dark dreams.

Twilight has been asked to look over Canterlot while Celestia and Luna are away, and is forced to cooperate with Discord to make up for her inexperience. However, can Twilight trust him when a great threat comes upon the city?