Who Owns the Glass Slipper?

Cinderella believes her fortune has turned the night the glass slipper touches her foot, yet each attempt to claim the prince ends in her death. Her stepsisters mutilate themselves to fit the shoe in earlier lives, and in the third she is finally handed over, only for the prince to smile and kill her. Dying, she realizes he was never searching for the slipper's owner but for the woman who saw through his secret at the ball. The man on the throne, she discovers, is a demon wearing the prince's face, and he will eliminate anyone who threatens his hold on the kingdom.