Dalziel and Pascoe investigate when the skeleton of missing miner Billy Farr is found in a mineshaft in the Yorkshire coalfields, four years after his disappearance. At the time, a seven-year-old girl was murdered, and initially, a serial killer who confessed to killing five other girls was suspected. However, she was good friends with Farr, and due to the fact they both went missing on the same day, certain townsfolk believed he was somehow responsible.