DCS Ian St Clair is called to investigate a tragic and unexpected murder in an ex-mining town as news of the crime threatens to inflame historic tensions.

As the hunt for the killer continues, Kevin Salisbury from the MET arrives to assist in the investigation. And tensions mount as the killer torments the community further.

As Ian and Kevin are called to the scene of a second murder, news breaks of a former spy in the community at Gary’s memorial service. Meanwhile, Scott remains at large.