From publisher blurb:
Blood of Freeport embroils the player-characters in a generations-old blood feud between two powerful merchant families -- the Lotharias and the Ischerns -- whose near-open warfare threatens to tear Freeport apart!
Freeport is a large and dynamic city. As such, Blood of Freeport is an encounter-based adventure, able to be run as a stand-alone tale, or spread out throughout a longer campaign. Will the PCs take sides with one of the families, try to stop the violence altogether, or work to profit from the rivalry?
Blood of Freeport uses the 3.5 edition rules, and is intended for a party of 6th to 8th level characters.