Three Boy Scouts—Westy Martin, Warde Hollister, and Ed Carlyle—travel to Yellowstone and befriend a sardonic stranger, Madison C. Wilde, whose mocking remarks foreshadow harsher lessons. Their sightseeing trip becomes a test of scouting skills when the boys confront wilderness hazards: becoming stranded, difficult climbs, dangerous streams, a wounded stranger, and close encounters with a grizzly. Episodes alternate lighthearted camp life and serious peril, forcing leadership, practical resourcefulness, and loyalty to emerge. The narrative blends action, outdoor problem-solving, and moral growth as the boys learn what it means to be prepared in wild country.