Jim Douglass, Gregory Peck, a rancher convinced that four men murdered his wife six months before, rides into Rio Arriba with a quiet sense of mission and a stubborn belief in his own version of justice. There, he learns that the four inmates—Alfonso Parral, Bill Zachary, Ed Taylor, and Lujan—are imprisoned for an unrelated murder and are awaiting execution; Lee Van Cleef as Parral, Stephen Boyd as Zachary, Albert Salmi as Ed Taylor, and Henry Silva as Lujan are kept under guard, with Herbert Rudley as Sheriff Eloy Sanchez granting Douglass permission to visit them. The tense meeting plants a seed of doubt in Douglass: the four men may not be the ones who shattered his family, but they become a focal point for his relentless pursuit.
In town, Douglass encounters Josefa Velarde, Joan Collins, the woman he once loved in New Orleans who now runs her late father’s ranch and has never married. Douglass, revealed as a widower with a daughter, finds in Josefa a complicated blend of old longing and new truth. As the town’s priest works to keep peace, Josefa learns from the priest the real events surrounding Douglass’s wife’s death, forcing Douglass to confront the possibility that his accusation against the men in custody may have been driven by grief more than fact.
The rhythm of danger quickens when the designated executioner arrives bearing a chilling deception: an imposter who stabs Sheriff Sanchez before being shot dead. The deception triggers a breakout; the four inmates escape, seize a young hostage named Emma, and flee into the surrounding hills. A posse bands together, and Douglass joins the chase the next day, discovering the body of the genuine executioner—ambushed before he could reach town. The real mystery tightens around Douglass as the fugitives begin to realize that the hunter has become a target.
Parral, tasked with killing Douglass, fails in his ambush, and Douglass uses a stark encounter with a photograph of his dead wife to make Parral’s guilt sting. The pursuit doesn’t end there: Douglass continues to track the trio, capturing Ed Taylor by rope and hanging him upside-down from a tree, a grim reminder of the moral line he is willing to cross in his quest.
The chase leads to John Butler, a prospector and Douglass’s neighbor, whose small house holds the key to Butler’s hidden gold and to the deeper truth about the deaths Douglass seeks to solve. Butler tries to escape, and Zachary shoots him dead, while Lujan goes after a sack of coins Butler had carried. Zachary and Emma’s fate becomes a brutal interruption as Zachary rapes Emma, and the sight of riders approaching prompts the criminals to flee, leaving Emma behind as Douglass and the others close in. Josefa and a ranch-hand ride in while the main posse converges from other directions, intensifying the final confrontation.
Douglass pushes onward to his ranch to gather fresh mounts, only to find that the fugitives have already claimed his last horses. A turn across the Mexican border leads him to a bar where Zachary hides in a world of bravado, and Douglass, unfazed by Zachary’s denial of knowing the woman in the photograph, shoots him dead. The pursuit then brings Douglass to Lujan’s house, where he finds a family and, once shown the photo of his wife, Lujan admits he has never seen her before. The crucial moment arrives when Douglass discovers the sack of coins Butler had taken from the ranch; Butler’s theft—and not the four men’ s supposed guilt—ties the whole tragedy together, revealing that Butler killed Douglass’s wife.
With the truth finally clear, Douglass feels a heavy weight of regret for the lives he has taken in pursuit of a murderer who may never have existed in the way he imagined. He returns to town seeking absolution, stepping into the church where the priest offers a measured, compassionate stance: he cannot condone Douglass’s actions, yet respects the man’s willingness to face the consequences without excuses. Josefa arrives with Douglass’s daughter, and the two leave the church together, carrying with them a quiet, complicated peace after a long and costly pursuit of justice.
Emma, Kathleen Gallant, remains a pivotal figure in the emotional aftermath, a hostage whose fate mirrors the uncertain moral weight of vengeance. The film closes on a note of somber reflection, as the community and Douglass reckon with the truth that justice can be a personal and painful burden, one that can only be weighed and borne in the quiet rebuilding that follows.
