Edward (Derrick Pierce) is worried about protecting his teen stepdaughter Rosie (Coco Lovelock)'s innocence while she's dating. One day he brings her a gift: a chastity belt. Although Rosie is surprised, she doesn't want to disappoint her stepfather, so she agrees to put on the belt. But as Edward helps her put the chastity belt on, he has impure thoughts about her that soon le to an obsession... Over the next few weeks, Edward secretly watches Rosie, fixated on the chastity belt as his lust steadily grows, until she one night asks for it to be removed so that she can please herself. She insists that she's been a good girl and that she still has needs that can't be ignored. Edward allows this, as long as he can stay to watch. Although stunned, Rosie is too horny from weeks of denial ...