Denias lives at the foot of Jayawijaya Mountains. He goes to school in a cottage on the hill run by Pak Guru (or Teacher), who comes from Java. Pak Guru convinces Denias to continue his education because he believes that the boy is clever and could become a mathematician. Maleo the soldier also encourages Denias to go across the mountain where a good school lies. Then Denias goes on a 10-day exped...