Things become complicated when Blake and Lampton become intimate, and the question arises whether he is being honest with her, or whether he is simply a master manipulator. Meanwhile, DCI Hedges and his team find themselves under investigation as Blake and her murder review team investigate the police shooting of Lionel Cripps, who was shot to death by an SO19 team following an armed stand off at his house. When Blake discovers that Cripps was a big-time police informant, she and her team set out to find out who is really responsible for Cripps' death.