Mathias is under pressure. Meg Mathias, his wife, has turned up in Aberystwyth, and he's under investigation by the IPCC following the death of Mari Davies. When a bus driver's body is found shot on an isolated mountainside, the investigation provides a welcome escape for DCI Mathias.

From the windswept sand dunes of the coastline to the badlands of the hinterland, this is a detective drama with pace, poetry and scale. A world of Blood, soil and belonging. A place that lives by its own rules: a natural crucible of colliding worlds where history and myth meet the modern and contemporary. Into this world steps DCI Tom Mathias. On the run from his past, a brilliant but troubled man. Having abandoned his life in London, he isolates himself on the outskirts of town – a town filled with secrets as dark and destructive as his own.