Matt Weaver (George Segal) returns home after fighting for the South in the Civil War to his home in the New Mexico territory. He discovers that in his absence his ancestral house and land have been sold by Sam Brewster (Pat Hingle), an unscrupulous land developer. Matt tries to kill Sam, but when the attempt fails, Matt barricades himself in the place he once called home. Sam sends for the colorful hired gun Jules Gaspard D'Estaing (Yul Brynner), a well-educated dandy whose mother was a black slave and father was a Creole. Jules is as adept with card and piano playing as he is with a six gun. When Jules gets drunk and tears up the town, Sam tries to make a truce with Matt to get rid of the deadly drifter. Janice Rule also appears, along with Bert Freed in his familiar role as the local sheriff.