Adventure Title
Kingdom/Empire/Land/Realm of (the) Circle/Ring/Obelisk/Column

Alternate title
Monster pick: Ghoul, Dweller, Serpent Folk, Abomination of the City

Opening Scene
A sewer system that is Claustrophobic where they encounter Natives that is/are Looking for a fight

Plot hook and draw
A dying man or woman that is/has Sent an invitation

Plot Concept
Overthrow the ruling elite that is motivated by Pure malice

Primary Antagonist
An unfeeling historian who/that is Obsessed

Plot fulfillment and location
A strange and alien device from A sunken ship