In 1986, Derwenthaugh Coke Works was closed and demolition work began. A strange discovery halts the regeneration plans. As there is no obvious explanation as to why the various artefacts should be there, the police become involved. The only clue which offers any progress points to events which took place many years ago. Just when a young police officer thinks she has seen something similar to one of the objects, and a new line of inquiry looms, higher authority descends on the investigation. The intrigue thickens.