Mistress Stella and her friends were tired of this professor. He was unfair to them and there was no justifiable reason. They later learned it was because they were hot and he wanted to fuck them. He was looking for a way to subdue them and make them to do what he wanted. But they are no ordinary girls. They invited him for some fun but found out it was fun to them not him. They slapped the shit out of him and warned him against being unfair to them.