Little Beaver falls off his horse and hits his head. Two soldiers from Fort Tuttle find him and think he is an Apache and take him back to the fort. When he wakes up, Little Beaver has temporary amnesia. A white boy comes by stage to the fort and torments Little Beaver. The two eventually leave the fort and fight over Little Beaver's pony, Papoose. The white boy gets lost and Little Beaver has to rescue him from a wild board and take him back to the fort.; Little Beaver and Red Horse have to stay and tend the sheep when most of the village goes to the Sun Festival. Nochin, the jealous medicine man, goes to the home of the scout Many Trails, and destroys the medicine the white doctor gave him. Little Beaver and Red Horse go to town to get more medicine and interrupt a bank robbery. The robbers go to the village to get the ill Many Trails to guide them over the mountain. Little Beaver and Red Horse ride to track down the robbers, but aren't sure what they'll do when they find them.; Little Beaver finds a long-lost tribe of Cliff-Dweller Indians hiding from the outside world in a hidden canyon.