The story comprises the adventures of a British doctor, recovering from tuberculosis, who goes to stay at a Derbyshire farm looking for rest and relaxation, becomes entrapped in a series of sinister events and is forced to uncover the mysteries surrounding "Blue John Gap" and the "Terror" that lurks within it.
Non Verified story
His daughter last dying words whispered in his ear before she gagged on choked on her blood dying in his arms, made him cry of sorrow to the top of his lungs crashing to his knees with her dead body. He was promised of her. Could he keep that promise?