In an effort to increase their popularity, Lauren and Patty orchestrate a series of outrageous practical jokes at Weemawee High. The plan backfires when a well known prankster gets all the credit.
Patty is chosen to represent Weemawee High on a TV quiz show. Muffy is also on the panel, along with a handsome senior, and both girls are determined to make him their top prize.
Lauren and Patty are pitted against Muffy when they go to bat for their favorite teacher. His radical lifestyle and unconventional teaching methods threaten to get him fired from Weemawee.
Bill Murray guest stars as Mr. McNulty, a free-wheeling Weemawee High substitute teacher, who creates some unexpected repercussions for the freshman class.
Patty and Lauren's pal, Johnny Slash, might help bring them popularity. His home run hitting streak attracts the 1982 N.L. Rookie of the Year Steve Sax, and other Dodger teammates.
Lauren's convinced that she and Patty have finally cracked the Weemawee High popularity barrier, but Patty knows the real reason behind their instant popularity, and can't reveal it.