London, November 1968. Detective Sergeant Cathal Breen has a death threat in his inbox and a mutilated body on his hands. The dead man was the wayward son of a rising politician and everywhere Breen turns to investigate, he finds himself obstructed and increasingly alienated. Breen begins to see that the abuse of power is at every level of society. And when his actions endanger those at the top, he becomes their target. Out in the cold, banished from a corrupt and fracturing system, Breen is finally forced to fight fire with fire.