Adventure Title
Jewel/Gem/Amulet of (the) Night/Midnight/Shadow/Darkness

Alternate title
Sorcerer/Witch of the City

Opening Scene
A sewer system that is Frozen where they encounter Natives that is/are Unfriendly

Plot hook and draw
A noble that is/has Asked for help

Plot Concept
Cover up a dirty secret that is motivated by Greed

Primary Antagonist
A guild leader who/that is Aggressive

Plot fulfillment and location
A cursed object from Mount Yimsha