For nearly 100 years, the Incas ruled the largest empire in South American history. The Incas had a society based on community and co-operation, with power controlled firmly by the Sapa Inca and the royal family. They were brilliant engineers, constructing magnificent forts and cities, and built roads, tunnels and bridges through mountains. Medical and surgical techniques were highly advanced, as were observations of the sun, moon and stars. But, above all, their devotion to the Gods was paramount. Invasion by Spanish Conquistadors in the early 1500's began the demise of the Incan Empire. Filmed on location in Peru, Bolivia and Chile.