Linu's Tale - NWN Henchman Quest (Chapter 1)
Linu's Tale is a side quest involving Linu La'neral, one of the potential Henchman in the Neverwinter Nights Main Campaign. You'll find Linu along with almost all other Henchman inside of the Trade of Blades building in the City Core. Each Henchman gets their own quest during Chapters 1, 2 and 3 which typically involves finding a specific item from somewhere in that Chapter and returning it to them.
Note: If you want to do the Chapter 2 and Chapter 3 quests for this Henchman you are required to complete the Chapter 1 quest and keep the item they give you as a reward. Failing to complete a Henchman's Chapter 1 quest will make their Chapter 2 and 3 quests unavailable to you.
For this quest you're tasked with finding the Silver Chalice of Moonbow which is inside of a chest in Meldanen's Estate. Specifically it's found inside of a chest in the same room you fight Meldanen on the basement level of his estate. A screenshot of the location I am talking about is shown below if you need help finding it.
Linu's Tale (Chapter 2) Quest Walkthrough
Linu's Tale (Chapter 3) Quest Walkthrough