A French nun, patrolling the convent's hallowed halls, happens upon a hidden pleasure. A teen sister, driven by an insatiable curiosity, is caught in the act of lesbian masturbation. The nun, her religious vows challenged by this taboo sight, watches as the teen's fingers dance over her engorged clit, her hips bucking in rhythm with her desires. The nun's own body responds, her pussy throbbing with a long-forgotten lust, as she struggles with her duty and her own secret, sinful urges.