At a rodeo, Jim Travis offers to ride a bucking horse in place of scared city-man Jim Traft, who has come from New York to learn the cattle business on his uncle's ranch. When Travis learns Traft has orders to build a drift fence to stop cattle rustler Clay Jackson, Travis accepts Traft's request that Travis impersonate him. With Travis' help, the fence progresses well, but Slinger Dunn, who is helping Jackson, threatens Travis. Slinger's father and grandfather were both killed stopping the last drift fence, which threatened to cut resources from the lesser Dunn ranch, and Grandma Dunn is determined that she and Slinger's sister Molly will stop the drift fence if Slinger fails.