This adventure is set in an amazing city called Parsantium. Although there's sufficient material within its pages for you to run it, for best effect go and grab a copy of Parsantium: City at the Crossroads - if you like intricate cities you won't regret it.
The first section, Running the Adventure, explains the background to the adventure which involves an ancient evil reaching forth once more and provides a brief introduction to Parsantium and an adventure summary. There's a detailed run-down of the ancient evil in question, and some hooks to help get the party involved in the adventure. There's a major festival soon, and quite understandibly folks would like it to be free of ancient evils.
Then the adventure proper begins, for once not in a tavern... it just leads to one later on. Not straightaway, however, the action begins with someone running amok on the docks. As events unfold, the party discovers that this is but the latest incident in a series of bewildering brawls that have involved people not normally known for being violent. Neatly, if the party isn't moved to investigate on its own, they'll be asked to find out what is going on and put a stop to it. Along the way there's an exciting and cinematic chase across a floating village and plenty of interesting people to talk to before they get to that tavern, and there are also opportunities for research as well as for action.
The tavern itself is well-described and there's a neat way in which some characters might pick up on there being something wrong even before they start delving below through the tavern cellar to the terrors that lurk in the sewars beneath. Never mind any ancient evils, the smells and sights of the sewars are bad enough - enjoy the atmospheric descriptions as the party explores...
The finale is suitably climactic, and there are notes to help you deal with the party's success or failure as appropriate. Overall it makes a stirring adventure which gives the party a chance to make a name for themselves at least in this corner of town. It's full of neat tricks to build up atmosphere and add to the realism of the town as well as to provide a suitably creepy feel that grows along with the body count!