Climb up elevator shaft. Fight undead. Find room with machinery, but decide not to investigate (what kind of adventurers are we?). Fight big undead. Find lots of traps. Sleep on stairs (because we’re stupid adventurers).
Fight hobgoblins in lounge room. Get ambushed on stairs. Fight lots of hobgoblins. Fight boss hobgoblin. Find intel. Sleep in hobgoblin boss room.