Erica, a reluctant student in her mistress's BDSM classroom, is introduced to the art of punishment. Securely tied to a wooden frame, a gag stuffed in her mouth, she braces herself as her mistress selects a wicked-looking whip from her collection. The first lash lands, a sharp sting that draws a muffled cry from Erica. The mistress works her way across Erica's back, each strike leaving a red mark, each cry swallowed by the gag. Between lashes, the mistress runs a soothing hand over Erica's sweaty skin, her touch a cruel contrast to the whip's bite. Erica's body, marked and glistening with sweat, is a testament to her mistress's skill and Erica's endurance.