The British Midlands. Inhabitants call it the “Black Country”—and with good reason. Bad things happen there.

When three members of a prominent family disappear from the Midlands—and a human eyeball is discovered in a bird’s nest—Scotland Yard’s Murder Squad is called in. But Inspector Walter Day and Sergeant Nevil Hammersmith have stepped into something much more bizarre and complicated than expected.

Superstitions abound in the intertwined histories of the villagers, including a local legend about a monster some claim to have seen. In addition, a mysterious epidemic is killing off the inhabitants, and the village itself is sinking into the coal mines below. Day and Hammersmith soon realize that they, too, are in over their heads. And the more they investigate, the more they fear that they may never be allowed to leave.