Sabra Cravat joins her new husband, lawyer Yancey "Cimarron" Cravat, during the
Oklahoma land rush of 1889. They encounter Yancey's old friend William "The Kid" Hardy and his buddies Wes Jennings and Hoss Barry. On the trail, Yancey helps Tom and Sarah Wyatt and their eight children, taking them aboard their wagons. It seems to Sabra that her husband knows everyone in Oklahoma. A small crowd cheers Bob Yountis and his henchman Millis when they attack an Indian family. Yancey joins his friend Sam Pegler, editor of the
Oklahoma Wigwam newspaper, in resisting Yountis. Yountis warns Pegler against using the paper for his crusading as he had done in Texas. Sabra is angry that Yancey risked his life for an Indian but she helps the others, including peddler Sol Levy and printer Jesse Rickey, in righting the Indians' overturned wagon. Sam and his wife Mavis reveal more about Yancey's past as a cowboy, gambler, gunman and lawyer. When 50,000 settlers race across the prairie to claim land, Tom falls and Sarah claims a dry, worthless patch. Pegler is trampled to death, and Dixie beats Yancey to the land that he wanted, so he asks Jesse to stay to help him run the paper. In the new town of Osage, which consists of tents and half-built storefronts, Yountis and The Kid terrorize Levy in the street. Yancey tries but fails to persuade the Kid to change. One night, Yountis leads a lynch mob against the Indian family. Yancey arrives too late to stop it, but he kills Yountis and brings Arita and her baby Ruby home. Meanwhile, Sabra gives birth to a boy whom they name Cimarron, Cim for short. Four years later, Osage is thriving. Tom has built an
oil-drilling apparatus but he is a laughingstock. Wes, Hoss and The Kid, wanted outlaws, try to rob a train but are all killed soon after. When Yancey destroys the $1,000 reward check, Sabra is furious because he does not consider their son's security. They try to enroll Ruby in school but the school board won't let her attend.Yancey leaves to be part of the
Cherokee Strip, but Sabra refuses to join him. Yancey joins the Rough Riders and serves in the Spanish-American War. Years later, he returns and Sabra and Cim forgive him. Tom finally strikes oil, but Yancey is disgusted to learn that Tom bought the
rights to oil found on Indian land. However, Yancey's campaign to win the Indians justice is a huge success, and he is invited to become governor of the
Oklahoma Territory. Sabra is disappointed to discover that Cim and Ruby have grown close. In
Washington, D.C., Yancey finds Tom with a group of influential men and learns that the price of his appointment is his integrity. When Yancy tells Sabra that he can't be governor, she sends him away forever. Cim and Ruby marry without warning and set off for Oregon, though Sabra tells him that he is throwing his life away. Ten years later, on the occasion of the
Oklahoma Wigwam's 25th anniversary, the United States' entry into
World War I is announced. Later, Sabra hears that Yancey has been killed in the war. ==Cast==