Feeling her sister isn't ladylike enough, Anne convinces Russell to enroll Gidget in a girls' school in France. Gidget, thinking her father wants back his freedom, pretends she's fine with the decision.
After Larue gets put down by a girl at the beach, Gidget decides Larue needs a make-over. Larue is more interested in an old horse that she wants to buy. Russ tries to help, and Gidget thinks her friend and her Dad are an item.
After a talk with her Dad, Gidget decides that her boyfriend, Mark, needs to learn a little chivalry. Gidget and her girlfriends all gather at her house for a pajama party to teach all their boyfriends a lesson.
Inge, a Swedish college student, stays with the Lawrence's until the dorms open. She changes from meek to wild and steals all the boys - especially Gidget's boyfriend Mark. Gidget fumes until Inga's fiancé Gunnar shows up.
While Gidget's true love, Jeff, is away at college, Gidget enjoys herself by dating the feuding Cook cousins. She happily finds out that Jeff, is coming home for the Founder's Day dance, but then realizes she has three dates for the dance.