In a secret chamber, a young nun, her body trembling with desire and doubt, is led to an ancient altar. A hooded figure, her face obscured, awaits. The nun's habit falls to the floor, revealing her naked, quivering body. The figure begins the ritual, her fingers exploring the nun's untouched flesh, her breath hot on her neck. She produces a phallic symbol, a relic from an ancient, forbidden rite. The nun's breath hitches as it enters her, her body tensing as it's withdrawn, marked with her virgin blood - her purity tested, her fate sealed.