Terror at Twilight Tavern

Publisher's blurb: Adventuring has been rather slow recently, and the party has been staying at the Twilight Tavern for several days. On this day, the wizened innkeeper comes to the party and asks them to kill rats in her cellar for a couple nights' stay and some money. Down below the wall has been partially destroyed, leading them to the sewers. There, they encounter blood-sucking stirges and several giant rats who are being led by one of their own...with arcane talent.