Zack's pursuit of his suitemate Leslie is complicated by the arrival of a new transfer student -- his old high school girlfriend, Kelly.

Zack gets off on the wrong foot with his new professor of anthropology, Professor Jeremiah Lasky. Professor Lasky pegs Zack as a smart mouth immediately and turns the tables on him by selling him a copy of the midterm before Zack realizes that he is the instructor. All the girls have crushes on Professor Lasky, while Slater is trying to gain weight so that he can wrestle in a higher weight class.

Slater is being courted by an exclusive fraternity while Leslie is being courted by a sorority. Zack really wants to get into the same fraternity as Slater, but they don't seem as interested in him. Zack manages to impress Rick the fraternity guy, but both he and Slater worry that Screech might ruin their chances in being accepted because of his goofiness.