Tom has been a lifelong friend of a female classmate named Pam and when she becomes a young woman, they start dating and start learning even more about each other.
Karen, a 15-year old, gets invited to go with Dave on a weekend outing to a nearby ski resort with three other couples. Dave, having fucked Karen a few times before, tells her not to worry about taking many clothes. What they're going to be busy doing doesn't require much in the way of being dressed.
Brother and sister devise a plan to have her kidnapped so that they can ransom her gang-boss stepfather for some money so that they can run away and live together. Then when the ransom is paid they make their fatal mistake! Instead of taking the money and running, they all have a free-for-all orgy and they get caught. At least it is by the police - or is it?