Frances Lee returns to father Billy Gilbert's ranch, writing that she looks forward to hearing all the cowboy music. So Charley orders musical instruments for all the hands and instructs Larry Adler in how to play the harmonica. What no one realizes is that Charley is the exact double of the Tabasco Kid, a romantic bandito who makes love to Miss Lee, who thinks it's really Charley, so come on now.
The set-up allows Chase to play two characters in two different registers. In the 1920s, he had been the young man, and so quite reasonable in romantic situations. Now, however, he was almost forty. So he adjusted his character into a prissier version, one who wore glasses and could be a book keeper -- as he is here. However, he was still young enough that he could play the Mexican bandit, a spoof of Warner Baxter's Cisco Kid.
I have no idea why Billy Gilbert has one foot in a huge cast. It is funny, though.