While Al Capone works his way up from top-dog street gang thug captain in Chicago to U.S. crime king, his brother Jimmy Capone chooses the righteous way, actually with father's blessing, leaving Illinois for small town Harmony in Nebraska, where he adopts the alias Richard Hart, marries teacher Kathleen, has offspring and becomes its incorruptible town marshal, with a loyal Indian deputy. When his efficient fight against Al's illegal alcohol trade starts to bite financially, the gang's top lawyer is sent to buy 'Hart' or order his death, but recognizes Jimmy and arranges a fraternal reunion in Chicago. Yet money nor threats can turn Jimmy bad...

自小一起长大的四兄弟，情同手足，长大后，他们同样像一个人似的，可是他们却走进了黑社会这个圈子，贩私酒为生，当时美国正好处于禁严高锋，小四不愿和三个哥同流合污，离家出走，从此杳无音讯，在一次无意的打击过程中，三个哥竟然没有想到的是在这个时候又遇到了离失多年的四弟，更没有想到的是，自己的亲弟弟却成了自己的反派，就这样兄弟们的关系开始进入的白热化……

Chicago. Années 20. Al Capone, alias Scarface, est en guerre contre la prohibition. Jimmy, le plus jeune de ses frères, revient après 10 ans d'absence. Il est totalement opposé aux méthodes et à la façon de vivre de son frère. Il choisit l'anonymat, et devient shérif d'une petite ville du Middle West. Mais il découvre que le trafic d'alcool transite par sa ville...