As the study group is preparing dioramas for the Environmental Club’s Green Week, Dean Pelton questions Jeff about his alleged enrollment in a class called Conspiracy Theories in U.S. History. Though Pelton suspects he’s running a scam to get unearned course credit, Jeff insists the class is real & offers to introduce him to its instructor, “ Professor Professorson.” Yet, as Jeff recklessly presses ahead in the hope that Pelton will give up before his ruse is exposed, he’s stunned when someone steps forward claiming to be Professorson. Meanwhile, with Pierce & Shirley off on a road trip to find the best hamburger in the country, Troy looks to avoid spending the night alone by arranging a sleepover in Abed’s dorm.