Scrooge McDuck and the gang embark on an adventure to locate the legendary Seven Cities of Cibola and it's treasure. The Beagle Boys catch wind of the expedition and make their own plans of conquest. Thus the contest begins!
A second four page story with Scrooge on a solo adventure completes the book.
Mr Barks credits the story idea to authority on old California Native American tribes, named Al Koch. See "Uncle Scrooge His Life and Times" by Carl Barks for the reprinted main story and after-word, published by Celestial Arts.