In the town of Cottonwood Springs, Texas at the turn of the century, Marshal Frank Patch is an Old West style lawman in a community determined to be modern. When Patch kills drunken Luke Mills in self-defense, the town decides it is time for the marshal to resign. But Patch refuses, reminding the citizens that when he took he job, the agreement was he could have it as long as he wanted. Afraid of Patch because of his knowledge of their misdeeds in the town's wilder days, the city fathers then decide the only way to remove Patch from office is by violence.