This three-part series illuminates the rise and fall of the ancient American empires of Maya, Inca and Aztecs. These high cultures brought about astonishing civilizational achievements in agriculture, architecture and astronomy to this day and dominated the Mesoamerican continent for over a millennium.

The four sons of Katie Elder reunite in their Hometown of Clearwater, Texas for their Mother's funeral, and discover that the family ranch is now in the hands of Morgan Hastings, the town's gunsmith.