A One-Round Living Greyhawk Principality of Ulek Regional Adventure
From the introduction:
Centuries ago a treasure fleet of a renowned merchant consortium, known as the Suss North Greyhawk Company, disappeared in the Azure Sea and for decades adventurers from across Oerth attempted to locate and claim its lost treasures. Many tried and failed, tried and died, and eventually the treasure was considered lost between the devil and the deep blue sea. However, an ancient organization has been reactivated and now armed with new information plans to find and claim the lost treasure to aid the Principality in its time of need.
A Principality of Ulek regional adventure for APLs 4-10.