Murder On The Palasade #1

Are group of heroes has entered the city of Fallcrest after a long days journey. They arrive to see a citizen impaled on a spiked pole atop the city walls. They speak to a group of citizens but the paladin is unable to draw there attention but the wizard easily coaxes an answer out of a young street urchin. He tells them that the impaled man is Councellor Louran, a member of the kings parliament. He also notifies them of the treat and randoms notes being sent by a local cult who are the suspects. They journey through the streets of Falcrest to the kings castle were they are granted permission to go investigate the crime seen of Louran's kidnapping. As they approach his house they must sneak around guards to enter. Once they are inside they examine the crime scene and determine that there was some form of dark magic teleportation spell used nearby. They also find some large boot tracks in the damp soil. But after the long day they choose to rest at a local inn. As they enter they notice a group of men in cloaks getting up and heading to the basement. They follow the down a long winding stair to a sewer which they clumsily attempt to pass. After a few attempts the cross the rushing river of sewage and enter on long tunnel. As they near the end they hear chanting and see an eerie green glow from behind a door. As they push forward they find it was only light reflecting of a mirror coming from another door at the end of the hall the hesitate but finally open the door to find a a glowing green orb with little wood carvings rotating around it in an arcane wave. Being a greedy dwarf Orest tries to steal the orb but ends up putting the tunnel into utter darkness. In the darkness they are attacked by a swarm of ravenous spiders who eat Orest alive. During the fight a member of there party was leaning up against the mirror when it toppled back revealing a hiding passage. They follow the passage into a dark room were they combat the cultist they saw earlier. After a quick struggle they defeat the humans and gather at another door. As the stop to listen they hear a chair being pushed out and heavy foot steps moving towards them...