A horny young babysitter, alone with her clients' mature husband and wife, finds herself in a thrilling predicament. The couple, hungry for new experiences, proposition the teen, who's equal parts shocked and aroused. They begin with hesitant touches, the wife's hand on the babysitter's thigh, the husband's lips on her neck. The teen's innocence fades as her lust takes over, leading to a passionate, forbidden threesome.