Harvard graduate James Averill (Kris Kristofferson) is the sheriff of prosperous Jackson County, Wyo., when a battle erupts between the area's poverty-stricken immigrants and its wealthy cattle farmers. The politically connected ranch owners fight the immigrants with the help of Nathan Champion (Christopher Walken), a mercenary competing with Averill for the love of local madam Ella Watson (Isabelle Huppert). As the struggle escalates, Averill and Champion begin to question their decisions.