Adventure Title
Skull/Bone of (the) Circle/Ring/Obelisk/Column

Alternate title
Priest/Priestess of the Tower

Opening Scene
A jungle that is Claustrophobic where they encounter Natives that is/are Suspicious

Plot hook and draw
The local militia that is/has Called in a debt or favor

Plot Concept
Tear a gateway to an ancient era that is motivated by Vengeance

Primary Antagonist
An evil priest or priestess who/that is Traitorous

Plot fulfillment and location
An otherworldly gateway from A lost island or ruin