My daughter is home for college and has asked her friends over to play (and me to DM).
A request was made for a combat-light short adventure with mystery elements.
I am trying to remember a specific Dungeon magazine adventure, I believe from the late '80's or earliest 90's. Could be 1e, 2e, or BECMI.
The players survive a shipwreck and land on the island of a minor noble / wealthy merchant.
The noble (?) is hosting a party and something mysterious is going on among the invited guests that the PC's can investigate (possibly a murder or disappearance?)
There are a number of different NPC's to have social interactions with - much of the adventure involves questioning witnesses and comparing stories.
There may be a set of female twins among the guests to confuse things.
There is some sort of shape-changing monster like a mimic or protein polymorph in the manor house.
Title and/or issue number would be greatly appreciated.