The small-town Frake family attend the Iowa State Fair, the annual highlight of their summer. Son Wayne (Dick Haymes) plots revenge on a midway barker (Henry Morgan) who had embarrassed him the summer before and falls for the beautiful singer Emily (Vivian Blaine), while his melancholy sister Margie (Jeanne Crain) becomes smitten with slick city-boy reporter Pat (Dana Andrews). Meanwhile, mother Melissa (Fay Bainter) and father Abel (Charles Winninger) plot to win their respective competitions.