Adventure Title
Jewel/Gem/Amulet of (the) Flame/Fire/Pyre/Brand

Alternate title
Demon/Devil/Fiend/Horror of the River

Opening Scene
A jungle that is Malodorous where they encounter Nobility that is/are Suspicious

Plot hook and draw
An anonymous letter that is/has Sent a warning

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

Primary Antagonist
A nefarious cult who/that is Covert

Plot fulfillment and location
The kidnap of a powerful figure from A lost island or ruin