There plan was hatched. The civilians were going to attack the tap room while the players assaulted the castle ruins. The assault started in the drainage tunnel when they ran into a creature called the Nothic.
They negotiated a deal and traded the Nothic a flute for his cooperation. They passed unmolested. A couple of rooms full of Redbrands and hobgoblins they came across what they discovered to be an alchemy lab. Little did they know that while they investigated the lab, the wizard known as Glassstaff was getting away.