When exposure to a combination of radiation and insecticide causes Scott Carey to begin to shrink medical science is powerless to help him.

Captain Henri Rochard is a French officer assigned to work with Lieut. Catherine Gates. Through a wacky series of misadventures, they fall in love and marry. When the war ends, Capt. Rochard tries to return to America with the other female war brides. Zany gender-confusing antics follow.