Mona Wales' fetish den, The Upper Floor, hosts a night of bizarre, intense BDSM. Mona, a master of submission, ties Marica Hase and an Asian beauty to chairs, their eyes wide with anticipation. A black master enters, his enormous cock already hard. He feeds it to the girls, who struggle to take its length and thickness. Mona watches, her own pussy throbbing, as the master and his friends take turns gagging the slaves, fucking their mouths and holes ruthlessly. The room fills with the sounds of slapping flesh, desperate moans, and the smell of sex and sweat.