Gildersleeve has jury duty.

On a trip to New York, a small-town blowhard gets caught between a wealthy widow and a gold digger.

Gildersleeve, running for office, is aided by two ghosts and hindered by a mad scientist and an invisible woman.

Dennis O'Keefe, newly married to lovely Sheila Ryan, is in a jam. O'Keefe's former girl friend, exotic dancer Marie McDonald, has in her possession an expensive, jeweled garter given to her by O'Keefe in his bachelor days. McDonald intends to show the garter to O'Keefe's suspicious wife, so Our Hero must retrieve the embarrassing accouterment without tipping off the missus.