Eric, Nicky and Tony attempt to raise money for the school by investing in the stock market, but things take a turn when the market crashes. Mr. Belding (Dennis Haskins) is sick, and Screech (Dustin Diamond) is in charge.
When Katie (Lindsey McKeon) injures her shoulder before an important swim meet, she takes painkillers instead of treating the problem. Screech (Dustin Diamond) operates a massage parlor out of Mr. Belding's (Dennis Haskins) office.
The gang competes in a video contest, but Eric (Anthony Harrell) tricks them into making the music video about him. He also lets Liz down on their science project. Mr. Belding (Dennis Haskins) injures his ankle and must use a wheelchair.
The gang does a stint at the police academy where Maria's (Samantha Becker) father works, but she is disappointed when he doesn't pay attention to her. Screech (Dustin Diamond) and Mr. Belding (Dennis Haskins) get handcuffed to each other.
Eric (Anthony Harrell) wants to become an honor cadet, but he loses to a guy named Mark, whom Liz (Ashley Lyn Cafagna) has a crush on. But Eric soon learns that Liz changed Mark's answers on the test that made him the honor cadet in the first place.
Katie (Lindsey McKeon) reads a critical remark about herself in Maria's (Samantha Becker) journal, which leads to a fight between the girls. Screech (Dustin Diamond) and Mr. Belding (Dennis Haskins) promote their store by holding a wrestling match.