John Carr has recently left the SAS, after a long and distinguished career, and is now working for a Russian oligarch in the murky world of private security. But an incident from his past - in which three terrorists were brutally killed - suddenly comes back to haunt him. Tracked by a hitman out for revenge, John Carr is forced to step over the line to defend himself and his family. It's a cruel and violent world - and one he thought he'd left behind.
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