Sheldon learns from Mrs. Davis in Human Resources that the university has come up with a solution to change his area of research from string theory to dark matter. They will promote him to junior professor, which has no strings to funding whatever area of research, but that it will require him to teach a graduate level class. After speaking to his friends, Sheldon agrees. However, his reputation precedes him as no one signs up for the class. As such, Howard, who has been thinking about working toward his doctorate, decides to enroll in the class as Sheldon's only student. While Howard truly wants to learn from Sheldon, Sheldon in turn only has one contrary goal in mind in being Howard's professor. Meanwhile, Bernadette and Penny are having a quiet feud over Penny seemingly not taking her new job as a sales rep at the pharmaceutical company where Bernadette works seriously. They both turn to Amy, who, for the first time in her life, feels like the popular kid in high school. As such, Amy tries to use her new position to divide and conquer to retain that special place in both their lives.