East-Central China: Archaeologists are working hard. The ancient imperial city of Fengyang was rediscovered by chance over 50 years ago and has never been excavated.

Initial excavations reveal that it was an enormous city, even more impressive than Beijing's famous Imperial City. What did it look like? When and how was it built, and why was it destroyed under mysterious circumstances?

Researchers are delving into these mysteries to unravel the secrets of this forgotten city and its lost imperial past.