DI Hillary Greene is feeling the strain. A sniper is on the loose, killing police officers all over the UK, and the atmosphere at Thames Valley Police HQ is understandably tense. But it is business as usual when a wealthy woman is found murdered in her home in the little village of Bletchingdon. Hillary soon learns that suspects are thick on the ground. Things don't get any better when she learns DC Keith Barrington has been keeping secrets and has the potential to be very disruptive to her team. But even as Hillary searches for a cold-blooded killer, a tragic event is looming on the horizon that will rock her world. Is this going to be the end for her?