When gangsters invade and shoot up a speakeasy on the outskirts of Chicago, Ness thinks Frank Nitti may be trying to get rid of some of his competition. When one of Nitti's joints is bombed soon after, the authorities are worried that a massive gang war may erupt. The problem for Nitti is that the out-of-town clubs are getting quality booze smuggled in from Canada and its drawing away his well-heeled customers.