With a kid on the way, Boyd needed the job bad. But the idea of going underground at the Hobart Mine, down into the dark labyrinth of tunnels to get at the raw ore, left him with a brooding sense of unease. Maybe it was the fact that his father had died down in the mines or maybe it was something much worse. Digging a new drift down in Level #8, the lowest level of the mine, an immense shaft opens up. Boyd and a few others volunteer to explore it...