With Al Capone out of the way, the mob is looking to relocate its base of operations outside of Chicago in a nearby community. Their first step is to get rid of the incorruptible mayoral candidate, Judge Leon Zabo, who they run down in the street. The Coroner's inquest is a sham and it is obvious that the Chief of Police, who appoints the Coroner, is already in the syndicate's pocket.

An accountant with a brilliant mind for numbers agrees to testify against the mob. But keeping him safe before the trial keeps Ness and his men on the run.