Clint Walker and Barry Sullivan star in this explosive Western, set in the wild and lawless Yuma Territory of the 1800s. U.S. Marshall Dave Harmon (Walker) is appointed by the governor to bring order to the territory, known for running off any lawman who dares to bring the rowdies to heel. Upon his arrival in Yuma, he is immediately tested, becoming embroiled in a struggle with the powerful Arch King (Morgan Woodward) after shooting King's brother. It will take all of Marshal Harmon's grit and determination to stop the violence and bring justice to Yuma.