Katharine Hilliard, mousy dean of a stuffy music school, meets and is insulted by swing band leader Barry Clayton on a train. To "show" him she takes a friend's advice, removes her glasses, and puts on a designer gown. Naturally, she becomes gorgeous. Soon, both Barry and crooner Jimmy Hale are after her, and she finds herself in the midst of triangles and misunderstandings.

Jennifer Smith heads a "Consumer Reports"-type company and her reputation for honesty is her greatest asset. While out boating one day she encounters a secret prototype submarine piloted by Bill Craig. Trying to explain her absence after her boat sinks becomes very difficult as Bill and his cohorts attempt to discredit her story.