Brought into a world of eternal night, a human male makes the acquaintance of Nightmare Moon, and forms an unlikely romance with her. Throughout the course of the story, he discovers her dark and depressing past, and her struggle to protect her kingdom from powerful invading forces, led by her sister, and her numerous associates, in a thousand years rivalry for control over the Sky. When he is suddenly given mysterious powers by an unknown presence, he'll help her turn the tables, and rebuild her weakening empire, and settle the score with her sister, Once... And for All.

Rated M for Violence, Blood and Gore, Sexual Themes, and Language.