Prohibition has just gone into effect, and Judge Rummy's wife eagerly throws away all of the Judge's liquor. She also plans to have a temperance lecturer use him as an example of the evils of drink. While waiting for the lecturer, Judge Rummy notices that Silk Hat Harry's Soda Fountain is remarkably popular, so he stops in to see what it's all about. He finds out that Harry has developed a substitute for alcoholic drinks, and that Harry's substitute can have quite an effect on those who drink it.
