Marc and his two friends are determined to find a Native American gravesite, but when they find one in a cave, Marc isn't sure whether he wants to sell it for the reward. His mother is fighting tuberculosis in a sanitarium, and the boy- buried with his dog- reminds him of himself. When he and his friends go exploring, they get lost and it seems a ghost of the Native American helps them out. They all realize that this is something too precious to share- even for a reward. ( )