In the grimy, echoing corridors of a South American prison, Luna finds herself at the mercy of Madam Bathory's cruel whims. Chained and barefoot, she's paraded before leering inmates, her tits and ass on full display. Madam Bathory, relishing Luna's humiliation, orders her to pleasure herself with a vibrator, ensuring every thrust is visible to the jeering crowd. But the real test of Luna's endurance comes when Madam Bathory introduces electrostimulation, sending jolts of pain through Luna's bound, bare feet, as she's forced to orgasm against her will.