Bondage enthusiast Casey Calvert is securely tied, her arms stretched wide and legs spread, revealing her vulnerable, puckered asshole. A sadistic master teases her with a riding crop, leaving red welts on her skin. He replaces the crop with a thick, glistening dildo, pushing it deep into her resisting anus. Casey's moans are muffled by a gag, her eyes watering as the master roughly fucks her ass with the toy, stretching her tight hole. He then replaces the dildo with his fingers, forcefully pumping them in and out, fingering her asshole mercilessly.