Two months since ex-Police Negotiator Laura Hart was forced back into action after her son’s kidnap, she has re-joined the force as a DI. On her first day, an anonymous tip-off leads to the discovery of a skeleton in a crumbling castle ruin near the seaside town of Beaumaris, Anglesey.

Laura can’t wait to prove herself by solving the case and when the investigation leads her to MI5 and the Real IRA, she knows she’s on the trail of something truly explosive.

But some people will do anything to stop their secrets coming out – as the rising body count shows. With the threat drawing in and her family yet again in danger, this time, is Laura in too deep?