Fourteen-year-old Macon Josey must earn enough money so his widowed mother won't have to give up his baby sister for adoption. He sees a chance when Uncle Bird Calfee offers him a job caring for art equipment on a trip to the brand new Yellowstone Park. Macon's mother fears marauding Indians, boiling geysers and ferocious bears, but Uncle Bird promises her he'll stay on routes that avoid danger, and he'll teach Macon to shoot his father's rifle. Macon...