As the west rapidly becomes civilized, a pair of outlaws in 1890s Wyoming find themselves pursued by a posse and decide to flee to South America in hopes of evading the law.
An itinerant farmer and his young son help a heart-of-gold saloon singer search for her estranged husband.
Jim Douglass arrives in the small town of Rio Arriba in order to witness the hanging of the four men he believes murdered his wife. When the convicts escape, Jim tracks them into Mexico, determined to see that justice is done. But the farther Jim goes in his quest for vengeance, the more merciless he becomes, losing himself in an unrelenting spiral of hatred and violence.
