Set in Texas during the late 1860s, Rio Bravo is a story of men (and women) and a town under siege. Presidio County Sheriff John T. Chance (John Wayne) is holding Joe Burdette (Claude Akins), a worthless, drunken thug, for the murder of an unarmed man in a fight in a saloon -- the problem is that Joe is the brother of wealthy land baron Nathan Burdette (John Russell), who owns a big chunk of the county and can buy all the hired guns he doesn't already have working for him. Burdette's men cut the town off to prevent Chance from getting Joe into more secure surroundings, and then the hired guns come in, waiting around for their chance to break him out of jail....