"Watch your step," was the last thing ?? warned them, and he had good reason too. The tunnel was pitch black, and the footing was treacherously steep and uneven.

The walls appeared to be made of carved out stone or perhaps even concrete, as if there was an underground bunker set in Stacy's flesh. The air got muggier as they went down, and moisture collected on the walls--and floor, making their footing even more slippery.

There was an acrid, almost-moldy smell in the air, completely alien and unfamiliar.