Rubi Ferraz, the Brazilian seductress, is alone and horny. She can't help but indulge in her desires, her fingers dancing over her clit, her body arching in response. She's a 'se' - a sinner - and she knows it, but she can't stop. Her moans grow louder, her touch more insistent, until she's lost in her own world of pleasure. Suddenly, she hears a noise. Someone's there. She freezes, her heart pounding, her body still throbbing with unspent desire. Will she be caught in the act?