In 1987, Jack Harlan clocked out of the Knox Coal Mine and disappeared. No body, no tracks, no answers. His wife Ellie waited as the mine swallowed him whole. Then the boots started moving. Clean. Empty. Coming closer every night with the smell of sulfur and Jack's voice whispering from the dark: 'Coal don't quit.' A chilling blend of real crime mystery and relentless supernatural dread that refuses to end.