Covering a time span of over ten years, this novel follows the fortunes of
the mining community of Aberfoyle near Stirling, Scotland. Receiving a letter
from an old colleague, mining engineer James Starr sets off for the old
Aberfoyle mine, thought to have been mined out ten years earlier. Starr finds
mine overman Simon Ford and his family living in a cottage deep inside the
mine; he is astonished to find that Ford has made a discovery of the presence
of a large vein of coal. Accompanying Simon Ford are his wife, Madge, and adult
son, Harry.
From the outset, mysterious and unexplained happenings start to occur around
the main characters, attributed initially to goblins and firemaidens. […]