After thirty years in the bathing suit business, Cohen and Kelly have fallen on hard times; their merchandise and their business methods are both out of date. While they are away on a selling trip, Cohen's daughter, Rosie, and Kelly's son, Pat, introduce a new line of merchandise into the family business. To promote it, they plan a beauty contest to be held in Atlantic City. Cohen and Kelly return in a rage, and the children sneak off to Atlantic City to avoid involving their parents in the contest. After numerous complications, Rosie wins the contest, the business is saved, and the two families share a happy reunion.