Declan Harris is found murdered in Epping Forest, with evidence claiming he's been forced into being a Special Branch informer. Clark is tasked with investigating the suspicion that the Branch also killed him. Meanwhile, Naylor has been transferred and takes up an existing murder investigation; his boss, however, is all too keen to get it wrapped up without delay. It transpires that Harris had recently contacted Inspector Dilke, who has him down as a fantasist. Deakin is seen talking to Trevor Bull, an extremely violent armed robber, and Clark is under pressure to get a quick- and convenient- result. Harry's principal suspect in the murder is Simon Bridge, the victim's nephew.