At the stern command of Masterspanking, a group of co-ed students file into the institute's dungeon, eyes downcast, hearts pounding with anticipation. They're here for a unique lesson in BDSM, and their first task is a public spanking. One by one, they bend over the leather-padded bench, baring their tender bottoms for the Master's paddle. The room fills with the sound of smacking flesh and their stifled cries, while fellow students watch, envious and aroused, in their underwear.