Shadow Cast Keep, Cult or no Cult?

EL = 2-4
Party Size Recommendation = 3-4
Estimated Time to Completion = 2 to 3 sit down sessions, about 2 to 3 hours a sessions
DM = Zach

The Guild should have finished the following adventures before starting this one.
"Goblin Lair, Cast Iron Tooth's Raiders" - https://faskal.forumotion.com/t4-goblin-lair-cast-iron-tooth-s-raiders
"Dragon Burial Site, Wheres Douven Staul?" - https://faskal.forumotion.com/t5-dragon-burial-site-wheres-douven-staul

Long have people of Whalesview been scared of the outside world, and have never spoken openly about being so close to a ruined keep that was partially responsible for the worlds flooding ages ago. Now the guild has reason to believe that a new cult may be investigating the area. Its up to us to stop the activity and get loot while doing it.

Adventure closed, Completed on March 4, 2017.
party
Caleb -
Lisa - https://faskal.forumotion.com/t38-shadow-cast-keep
Will - https://faskal.forumotion.com/t40-shadow-cast-keep-slagathor-addition