Derek is Katrina's professor and she's been lusting after him for years, but he maintains a strictly professional relationship with her. She surreptitiously finds out he's into BDSM, she does a little research and then has a chance to attend a costumed BDSM party where she hopes he'll be. He's there, and under cover of her disguise she agrees to be his submissive for the evening. He gives her erotic experiences she never imagined. The sex scenes were really hot. Maris does a great job with the sexual tension build up and with the honest reactions of a woman who is way outside her comfort zone but finding she really likes it.