Augie 'The Banker' Ciamino is a bootlegger who seems to have developed an almost foolproof way of manufacturing his liquor. He has equipped over a hundred immigrant homes with small stills to actually make the stuff and a unique way of collecting the product. Not everyone in the immigrant community is participating in the illegal liquor-making operation and Eliot Ness visits a night class where adults learn English. His visit is followed by Ciamino's thugs who give the teacher a beating in front of his students. When shopkeeper Renzo Raineri intervenes, he learns that his son, a bookkeeper, is part of Ciamino's organization. Once Ness at his men learn how Ciamino collects the liquor, they try to catch him with goods but through intimidation and murder, the mobster proves to be elusive.