Katie is happy when Nicky asks her to the upcoming Fall Formal dance. Maria's date's father will be a chaperone. He's Paul Wilson, a big record producer, and Ryan has a plan to get him to hear Eric and his brothers sing at the Formal. Maria and Rachel are super-excited about the new dresses they've bought for the dance, but Katie is beginning to feel ashamed because her parents can't afford a new dress for her this year. Mrs. Peterson alters a dress of Katie's sister's, though, which Katie plans to wear. Ryan engineers a breakup of the Bayside Barbershop Quartet (who were supposed to be the Formal's only entertainment!), then has Mr. Belding listen to Eric and his brothers. Belding gives them the job on the spot. Katie is afraid she will embarrass Nicky in an old dress. To raise money, she tells Screech she can fix the broken air conditioner that has been plaguing Mr. Belding. Screech gives her the job. She and Nicky manage to fix it, but it soon blows up. Katie confesses to Screech that she did the job just for money to buy a dress. Meanwhile, Ryan has Eric do an audition before a fake producer played by Screech. Eric is stricken by stage fright even though he's just singing before Screech. He tells Ryan his voice is gone and he can't sing at the dance. When Ryan and Maria tell him Mr. Wilson won't be there after all, his voice comes back. Katie decide she can't go to the dance, either, and stages a breakup with Nicky. Nicky tells Screech he was part of the air conditioner fiasco and Screech tells him about Katie wanting to buy a new dress. The night of the formal, Nicky comes by Katie's house dressed in his tux, gives her a corsage and pleads with her to come to the dance with him. She is apprehensive, but agrees. When she gets to the prom, it turns out that Rachel and Maria love her remodeled dress but hate their own new expensive ones. Screech and Ryan hide Mr. Wilson from Eric, and he and his brothers perform. But Wilson doesn't hear their performance—he's helping fix Belding's air conditioner! Katie and Nicky share a dance and a kiss.