Lobby card for the film
Vivacious Lady is a story of love at first sight between a young botany professor named Peter Morgan Jr. (Stewart) and a nightclub singer named Francey (Rogers). The film also has comedic elements, including repeatedly frustrated attempts by the newlywed couple to find a moment alone with each other.
The story begins when Peter is sent to Manhattan to retrieve his playboy cousin Keith (Ellison) and immediately falls in love with Francey. After a whirlwind one-day courtship, Peter and Francey get married, and they and Keith return to the Morgan family's home, where Peter teaches at the university run by his father Peter Morgan Sr. (Coburn). Mr. Morgan is known for being a proud, overbearing man, so Peter is afraid to tell him about the marriage. When they arrive, Mr. Morgan and Peter's high-society fiancÃ©e Helen (Mercer) initially take Francey for another of Keith's girlfriends. While Peter decides how to approach his father with the news, Francey stays at a women-only hotel, and Peter and Keith introduce her as a new botany student.
Peter mentions Francey to his father twice, but on both occasions, Mr. Morgan interrupts and ignores his son, and when Peter becomes insistent, his apparently ailing mother (Bondi) has a flare-up of her heart condition, making any further conversation impossible. For his third attempt, Peter decides to announce the marriage to his parents at the university's student-faculty prom. Keith brings Francey to the prom as his own guest, and Francey, still posing as a student, develops a friendly rapport with Mrs. Morgan, but gets into a nasty brawl with Helen in which Francey accidentally punches Peter's father.
Peter says nothing at the prom, but blurts the news to his father just as Mr. Morgan is about to give an important speech, resulting in another argument and another flare-up of Mrs. Morgan's heart condition. This prevents Mrs. Morgan from learning who Francey is, but she accidentally finds out from Francey herself during a conversation in Francey's apartment. Mrs. Morgan accepts the news happily, and admits to Francey that she pretends to have heart trouble any time her husband gets into an argument, but Mr. Morgan demands that Francey leave Peter, threatening to fire him if she doesn't. Francey agrees to leave, but the incident releases thirty years of marital frustration in Mrs. Morgan, who also decides to leave her husband.
Francey tells Peter she will leave him unless he can change his father's mind before her train departs. Peter's solution is to threaten the family with disgrace by getting drunk and otherwise misbehaving until his father relents, even if it costs him his job. Peter passes out before he can reach the train, which departs with both Francey and Mrs. Morgan aboard, but Mr. Morgan, having finally yielded to the combined pressure of his son and wife, stops the train by driving ahead of it with Peter and parking the car on the track. Both marriages are saved, and Peter and Francey finally have their honeymoon on the train.
Who decides to leave her husband?
Mrs. Morgan