Dominatrix Mistress April transforms a clinical setting into a playground for her depraved desires. She sews her slaves' mouths shut, muffling their cries, then proceeds to torment their genitals with an array of medical tools. A catheter finds its way into the male slave's cock, while sounds stretch his urethra, drawing a mix of agony and ecstasy. The female slave, bound and helpless, can only watch as April attaches electrodes, sending electric shocks through their genitals. She then forces them to defile themselves in front of her, their humiliation palpable, yet their bodies betraying their arousal, cocks hard, pussies wet, as they succumb to April's twisted medical exam.