Brad and Janet, a newly-engaged all-American couple, leave Denton, Ohio to seek their old friend and mentor, Dr. Scott. Heavy rain and a flat tyre lead them to seek assiatance at a lonely castle, home to Dr. Frank N. Furter and his minions. So begins a night that will leave Brad and Janet changed forever as Frank leads them on a journey of sexual self-discovery that takes them inside the very secret of life itself - for this is the night that Frank will reveal his greatest creation to the world! It is the unexpected arrival of Dr. Scott that allows the bewildered pair to understand fully what they have seen through their running make-up. But their adventures are far from over...