A routine poker game takes a dark turn when a group of angry players lynches a suspected card cheat. Soon afterward, members of the mob begin dying one by one, leaving a frightened town desperate to uncover the killer before more lives are lost. As suspicion spreads, the mystery builds toward a deadly showdown.

Dean Martin stars as a gambler determined to uncover the truth, while Robert Mitchum delivers a memorable performance as a mysterious preacher whose arrival raises questions throughout the town. Supported by Inger Stevens and Roddy McDowall, the film combines Western action with a classic whodunit storyline.