Two bodies. One survivor. A chilling truth.

Detective Jamie Johansson is finally finding normality in Stockholm when a phone call from her estranged mother draws her back to the UK. The bodies of two women have been discovered in the Brecon Beacons, badly beaten and buried shallow, and rumors of a trafficking ring are swirling. But when a crucial piece of evidence is accidentally destroyed, suspicion falls on those handling the case.

The National Crime Agency seizes control of the investigation, but the local police hide a vital piece of information: there is a third victim. And she's still alive. Jamie is thrust into the middle of the storm, allying herself with a former partner to answer the ultimate question. Who wants this girl dead, and why?

Jamie vows to protect her at all costs, but the killers are determined to finish the job, and will stop at nothing to silence her before she speaks. Who can Jamie trust to help uncover the truth? And will it be enough to save the girl, and herself, before they find them?

As the last light of day begins to fade...darkness is coming for them all.