Posing as a hangman, Mace Bishop arrives in town with the intention of freeing a gang of outlaws, including his brother, from the gallows. Mace urges his younger brother to give up crime. The sheriff chases the brothers to Mexico. They join forces, however, against a group of Mexican bandits.
After a band of drunken thugs overruns a small Indian Nation town, killing Minister Goodnight and raping the women folk, Eula Goodnight enlists the aid of Marshal Cogburn to hunt them down and bring her father's killers to justice.
An eighteen-foot grizzly bear figures out that humans make for a tasty treat. As a park ranger tries rallying his men to bring about the bear's capture or destruction, his efforts are thwarted by the introduction of dozens of drunken hunters into the area.