The narrative follows a group of young sportsmen and companions who travel across frontier country with emigrants and guides, pursuing wild horses and encountering disputes over direction and trust. Episodes include horse trading and recapture, dealings with an Indian, a mysterious woodsman, attacks on the emigrant train, discovery of buried treasure, and being snowbound in the mountains. Characters cope with a stowaway, a silent witness to a crime, misfortunes that lead to a cheap boarding-house, and schemes to return home. The story emphasizes practical skills, loyal friendship, and improvised solutions as the party navigates danger, scarce resources, and lawless strangers in a sequence of adventurous incidents.