Gangster and cop killer Jack Martin is on the run from the law, and hides out in a small town. Low on funds, he engineers a clever bank robbery that yields him a big bundle. Now he has not only the cops and the FBI after him, but also the local crime boss, who's outraged that an outsider can pull off a heist like that in his territory and not cut him in on it.

In this unusually accurate biography, small-time hood Al Capone comes to Chicago at the dawn of Prohibition to be the bodyguard of racketeer Johnny Torrio. Capone's rise in Chicago gangdom is followed through murder, extortion, and political fraud. He becomes head of Chicago's biggest "business," but moves inexorably toward his downfall and ignominious end.