When Peter Morgan, a young botany professor from Old Sharon, New York, goes to Manhattan on orders from his father to bring back his wayward cousin Keith, he instead falls in love with Francey, a high-spirited nightclub singer. After a day of starry-eyed courtship, Francey and Peter marry, but are unable to consumate the union on the train to Old Sharon. The couple then must face Peter's domineering, conservative father when they arrive at the university town. Upon seeing blonde Francey at the train station, Mr. Morgan immediately assumes that she is Keith's lover and refuses to discuss her with his son. Afraid of upsetting his heart-troubled mother, Peter decides to tell his parents and Helen, his snobbish fiancée, about his marriage at the school prom and sends Francey off to stay with Keith in his bachelor apartment. Posing as a botany student, Francey shows up at the prom with Keith, but before Peter can bring his parents and new wife together, Francey is taunted into a hair-pulling brawl with the jealous Helen. Worried about his cousin's penchant for womanizing, Peter tells Francey to leave Keith's place, and she moves into a women-only apartment building. Finally, Peter manages to tell his father about Francey, and after the initial shock of the news wears off, he condemns the marriage. In the wake of her husband's fury, Mrs. Morgan falls ill. The next day, however, having been told by Helen that Francey has seduced her son, Mrs. Morgan goes to confront Francey in her apartment and happily learns the truth. Mr. Morgan arrives and orders Francey to divorce Peter, but Mrs. Morgan revolts and decides to leave her husband. Having revealed that she has been feigning her heart attacks, Mrs. Morgan leaves Old Sharon on the same train as a depressed, discouraged Francey. The two women and their husbands are soon reunited on the train after Peter successfully challenges his father's authority and convinces him that love is more important than either image or career.