After damning CCTV footage surfaces, British soldier Shaun Emery is accused of a crime he denies committing; up-and-coming Detective Inspector Rachel Carey is assigned to investigate.

DI Rachel Carey is forced to search for alternatives in pursuing Shaun Emery after key evidence is mysteriously withdrawn from her investigation; meanwhile, Shaun searches for answers of his own.

While the CIA interrogates Shaun in a covert safe house, DI Rachel Carey's investigation leads to an unsettling discovery about manipulated CCTV footage; Shaun's quest to clear his name takes a devastating turn.

Rachel and Shaun come face to face and Shaun encounters mysterious strangers who offer to provide him with the answers he seeks; Rachel pays Napier a visit.

As Shaun meets the powers behind his downfall, neither he nor Rachel is prepared for the danger lurking ahead; Rachel uncovers a key piece of evidence.

As the most guarded secrets of the intelligence services risk exposure, Rachel and Shaun team up; Rachel faces a terrible choice that will not only decide Shaun's fate, but that of the nation's entire criminal justice system.