After finding out that McMillian had one girlfriend when he himself was a student at Bayside in 1959, Mr. Belding, Screech and the gang attempt to track her down in hopes that she will talk him out of demolishing Bayside. At Bayside's 1950's nostalgic prom, news of Bayside's immediate demise draws some of Bayside best known alumni, Zack, Lisa and even A.C. Slater, to help the new gang save the school.
—Anonymous