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.

But some wars never end.