A Kiss in Time.

Although she finds the stiff Bostonian manners of her fiancé, Robert Ames, unsuited to her temperament, artist-illustrator Sheila Athlone refuses to illustrate an author's story because of its "absurd" premise that a girl would kiss a man she met only 4 hours earlier. Author Brian Moore, setting out to prove his point, poses as a butcher boy and induces her to ride out to a country orchard. His advances are refused until he saves a child from an explosion, and 2 minutes before the time limit, in admiration of his bravery, she allows him to kiss her.