Roscoe Ails wants to sell an insurance policy to Donald Novis. His sister, dancer Mitzi Mayfair, offers to help him.
It's mostly a showcase of Novis' singing, which he does in more than one style, from ballad, to novelty, to Irish tenor. He's very good, and even if he never translated his voice to movie stardom, he had a long career, with a song in the cartoon version of LADY AND THE TRAMP - repeated in the 2019 version.
The other performer people might come to see was Miss Mayfair. She was a nice tap dancer who appeared in a few movies in this period, and then vanished from the screen. Taking part in a USO tour during the Second World War led to a role in FOUR JILLS IN A JEEP, but that did nothing to produce further movie roles. She died in 1976 at the age of 61.