Scrambling to find Zipper a date for the Valentine's Day dance, the Pi Nu brothers settle on Seymour's overweight sister Marilyn, who is visiting for the weekend. As a prank, Harlan arranges for Zipper to be crowned "King of Hearts" at the dance.

En route to Florida for spring break, Checko, Ronald and Zipper end up stranded at a seedy roadside diner when their car breaks down. They are shocked to discover the snobbish Mary Lee working as a waitress.