In the dark and gloomy city, where the shadows hiding their secrets became even more dangerous with the setting sun, young girl, deprived of other opportunities, is forced to become the servant of the mysterious and terrifying demon known as Aurelius. She lost her family and was left penniless, and the demon turned out to be the only one who offered her shelter in exchange for eternal servitude to him. Aurelius initially displays his power and authority, using she as his slave, suppressing her freedom and dignity. But as she begins to see beyond his mask of darkness and cruelty, she notices his inner dichotomies: moments of softness when he shows care and protection.