Brandon is excited when Sheryl, his ex-girlfriend from Minneapolis visits. When Sheryl meets Dylan, she becomes aroused by his money and glamour, making Brandon jealous and violent. Brenda develops a crush on her algebra teacher and is disappointed to find out that he has a wife and children that she has agreed to babysit. Cindy worries about Brandon losing his virginity and nags Jim to have the sex talk with him.

An unreasonable history teacher makes his students' lives miserable by using an infamous steep grading curve and when Brandon learns that Steve gets A's by stealing exams before the test, he decides to follow suit. Brenda and Kelly vie for Dylan's attention and when he states that he prefers blondes, Brenda grows insecure and decides to dye her hair but the result is horrifying.