Audrey Royal, a curious 18-year-old, yearns to explore her uncharted desires with her stepfather, Justin Magnum. She finds an opportunity when Kara Faux and her stepdad, Eric John, visit. Audrey, Kara, and their stepfathers engage in a wild, taboo foursome, with Audrey eagerly taking on both men in a cowgirl ride and a group sex frenzy, stretching muscles she's never used before.