Two squeaky clean college kids – Brad and his newly minted fiancée Janet – find themselves in a jam when, by a twist of fate, their car breaks down outside a creepy mansion en route to visit their former college professor. When they knock on the door to ask for help, inside they find Doctor Frank N. Furter, a Transylvanian transplant with a wicked plan to trick the pair into some thoroughly immoral acts – and a living muscle man named Rocky in his laboratory…