The film tells the story of vaudeville performers in San Francisco, during the period of the 1915 Panama Pacific Exposition when Alexander Graham Bell made the first transcontinental phone call from New York City to San Francisco. The movie introduced the song "You'll Never Know", which was sung by Alice Faye and won an Academy Award for best original song. Although Faye never made an official recording of the song, it is often named as her signature song.
