After her first client, Albert Osborne (Robert Benchley), makes a heavy pass and refuses to take “No” for an answer, Susan Applegate (Ginger Rogers) quits her job as a Revigorous System scalp massager and decides to leave New York City and return home to Stevenson, Iowa. At the train station, she discovers she has only enough money to cover a half fare, so she disguises herself as a twelve-year-old girl named Su-Su. When two suspicious conductors catch her smoking, Su-Su takes refuge in the compartment of Major Philip Kirby (Ray Milland) who, believing she is a frightened child, agrees to let her stay in his compartment until they reach his stop.