A One-Round Living Greyhawk The Splintered Sun Meta-Regional Adventure
From the introduction:
The strength of Ahlissa rests in the hands of the Great Guildmaster and his formidable merchant vessels. Sometimes these ships have more than bounty of Ahlissa in them and trouble ensues. Now a merchant is dead, his secrets with him but some loose ends remain...
One round investigative scenario for [character levels] 4 - 10.