A major dance contest held at The Max is set to be hosted by Casey Kasem and televised on NBC (the network behind Saved by the Bell in real life).
Lisa (Lark Voorhies) uses her father's credit card as a reward for doing well in school; but she goes overboard with her spending, and the gang must help her think of how to make money to defray her debt.
When Screech (Dustin Diamond) is hit by lightning, he gains the power to see into the future, which Zack (Mark-Paul Gosselaar) and his friend, Slater (Mario Lopez), use to their advantage.
Zack and Slater break the school's professional camera and hatch a plan to make quick money to pay for a replacement before Belding finds out.
However, while they are babysitting, Kelly injures her arm, and the gang is left to care for baby Billy throughout the school day.
However, on the evening when the class trip is due to leave, Rod's true colors are revealed when Zack overhears that he has made other plans to spend the weekend with a stewardess.
After Belding also has a tiff with his wife, the guys are left spending time with him while he is kicked out of his house, making matters worse.
The gang joins Screech's girlfriend Violet (Tori Spelling in one of her early roles) in the glee club in order to go to a competition in Hawaii.
When Eric refuses and gives her trouble by calling her a "chick," Jessie gives him a black eye for being a sexist and tells him that she wants him out of her life.
To make amends, Eric puts Belding's car back together himself so that Zack and Slater do not get into trouble, and apologizes.
After getting drunk at a party and crashing Lisa's mother's car on the way home, Zack and the gang learn the worst thing about drinking and driving: having to face the music from their enraged parents.
The gang hurts their chances of winning the academic championship after causing a teacher's strike so they can go on a ski trip.
However, Zack regrets his plan after Screech mistakenly includes Kelly on the video and she starts receiving calls from other guys.
However, when Jessie and Zack find out they have to kiss in the last scene, they start to wonder if they are more than friends, and question their feelings for each other (falling out with Kelly and Slater in the process).