Adventure Title
Jewel/Gem/Amulet of (the) Crown/Scepter/Throne

Alternate title
Monster pick: Ghoul, Dweller, Serpent Folk, Abomination of the Citadel/Castle/Fortress

Opening Scene
A hidden temple that is Foggy or misty where they encounter Nobility that is/are Looking for a fight

Plot hook and draw
An anonymous letter that is/has Called in a debt or favor

Plot Concept
Complete an infernal ritual that is motivated by Vengeance

Primary Antagonist
A pirate king or queen who/that is Manipulative

Plot fulfillment and location
A precious jewel from A trap-filled dungeon