Judy Peabody saves an old man from drowning. He turns out to be Jerry Bates, "J.B." to his lawyer Curtis, "Pop" to Judy, who mistakenly believes the wealthy old-timer to be poor.
Pop instructs his lawyer to reward Judy with everything her heart desires, anonymously. A hat check girl at New York's popular Stork Club nightclub, Judy's dream is for her bandleader boyfriend Danny to return home from the Marines so she can sing with his band.
A letter from Curtis informs the young lady that she now has a brand new apartment, free of charge, and a line of credit at a fashionable department store, no strings attached. She promptly buys dresses and furs, without knowing the identity of her benefactor.
Pop comes to the Stork Club to keep an eye on her. She lands him a job as a busboy, but that doesn't work out, so she invites Pop to share her apartment. Danny comes home, excited to see her until he sees the apartment, the clothes and the old man. Believing her to be a "kept" woman, he falls out of love with Judy.
Billingsley is invited by Judy to hear the band. Impressed, he gives them a job at the club. Judy finally discovers that Pop is responsible for her new riches and is able to win back Danny's love and give back to Pop his wife.
Who sends the letter to the young lady?
Curtis