The film begins promisingly, showing "Rio" (Marlon Brando) and his friend "Dad" (Karl Malden) successfully robbing a bank for gold pesos. However, their escape doesn't proceed smoothly, and they’re forced apart when needing new horses. “Dad” sets off to find the cattle herd but forgets about his companion, who is caught by law enforcement. After five years, "Rio" becomes interested in an offer from "Amory" (Ben Johnson), which could bring him money and a chance at retribution against his former colleague now serving as sheriff in Monterey. It seemed initially like it would be a straightforward revenge western, but the story quickly shifts into a sentimental drama when "Rio" develops feelings for the young "Louisa" (Pina Pellicer), who is the stepdaughter of “Dad” and his new wife "Maria" (Katy Jurgado). Could his quest for vengeance now be softened by an even stronger longing? I thought only Johnson gave a truly strong performance; his character boasts confidently but ultimately reveals himself to be quite cowardly. Slim Pickens also contributes with some amusing moments as the lecherous deputy “Dedrick,” though I didn’t find either Brando or Malden particularly threatening, and there isn't much happening during its extended period of contemplation. The final scenes offer a resolution, but it feels hurried and rather unsatisfying—as if no one wanted to commit to bringing the story to a definitive end. It is visually appealing with some nice cinematography establishing the setting, but as a western portraying the decline of that era, it simply drifts along in a disappointing fashion.

Source on TMDB