Twilight's nights have been restless as each is plagued with nightmares. She cannot sleep, she cannot eat so Twilight pours herself into her studies and tries to discover why she keeps having these terrible dreams only to discover a prophecy that could destroy everything she holds dear. Now Twilight has one moon to find out how to stop the curse before all of Tartarus can escape, literally. But if this was her only problem then things might have been easy. Twilight's magic has been changing, becoming unstable and becoming dangerous. She'll need all the help she can get to control her newfound abilities. And when she really needs it, will she be able to rely on them?