The Furnace Room
Former patient Ilesi Scaen was in the process of torturing orderly Campre Linweigh to death when the survivors awoke in grimy cells in an unfamiliar dungeon. A splintery worktable sat between the cells with a smaller table nearby, covered in an array of sharp instruments not designed for use on a humanoid body. A huge, unlit furnace was around the corner from the cells, apparently being used to dispose of corpses and other waste.
After they escaped their cells, Scaen fled and the survivors journeyed up into the Asylum proper.