Montana Larkin and Jingle Bob Morgan, cowpunchers and partners, ride into new territory to join an impending land rush. They have with them a mail order catalogue, which contains a map giving the location of valuable mineral deposits, which they expect to secure by location at the time of the land rush. They stop overnight at the ranch of Jim Parker, where Montana saves Parkers daughter Mary from a wild horse. That night, the overtalkative Jingle Bob plays cards with a ranch foreman named Gillespie, who is jealous and suspicious of Montana, and reveals the secret of the map contained in the catalogue. Hank, Gillespie's aide, steals the map, copies it surreptitiously for Gillespie and returns it without being seen. Next morning, the two cowboys, Parker, Mary, the niece Ann Hardy, Gillespie and others from the ranch gather at the starting point of the land rush and Montana learns that Gillespie has a copy of the map. Montana and Jingle Bob realize that their only hope is to ride like the wind to the mineral deposits before Gillespie, but during the mad rush; Mary falls from her horse and Montana picks her up as he passes her on the run. At this moment, his horse falls over an unseen embankment and all the other horses, riders and wagons plunge after them.
