Studying for her Master's Degree in Psychology, Gwen works part-time as a waitress and a teaching assistant to help her finances. Her supervisor and faculty advisor is Professor Carol Robinson, a strict and formidable woman who stands for no nonsense in her classes... so when Gwen is asked to stay behind in class, she is terrified. The professor is not happy with Gwen's performance, and there is only one option left for Gwen - to participate in the professor's private training programme, which supplements her research on obedience and motivation. A few days later, Gwen turns up at the professor's house; it is then she learns that the program involves the application of extensive corporal punishment on her bare bottom! And she is not the only candidate - the other is the professor's wayward niece, Wendy. Gwen watches in horror as Wendy is spanked and paddled... and then it is her turn! The regime continues over the following weeks and months, and both girls have very sore bottoms. But they also form a strong bond and improve their behaviour and academic performance, much to the satisfaction of the stern professor.