Secret of the Andes is a story of cultural mystery and personal identity.
Cusi, a modern-day Native American boy, and his guardian, Chuto, tend a herd of prized llamas in Hidden Valley, an isolated valley high in the Andes Mountains. Cusi is unaware that he is a direct descendant of the ruler of the ancient Incas. During the course of the story he is instructed by his guardian in the religion and history of his ancient people, and goes in search of his true identity. Cusi's search leads him to the modern city of Cuzco, where he searches in vain for a suitable family. His quest ends when, reconciled to his identity, he returns to Hidden Valley to assume his duties as the guardian of the Inca treasure and culture.