A novel about the fortunes of a mining community called Aberfoyle which is near Stirling, Scotland. Miner James Starr, after receiving a letter from an old friend, leaves for the Aberfoyle mine. Although believed to be mined out a decade earlier, James Starr finds a mine overman, Simon Ford, along with his family living deep inside the mine. Simon Ford has found a large vein of coal in the mine but the characters must deal with mysterious and unexplainable happenings in and around the mine.