Alex and Pip are in desperate need of an escape. Their stressful roles as hostage negotiators are eased only by the fact that they get to come home to each other every night.

When an old friend invites the couple up to the Scottish Highlands for an extended break, Alex and Pip jump at the chance. It's the rest they both need.

But soon after they arrive at the castle, they hear the sound of gunshots, and their perfect escape turns into a perfect nightmare. The remote mountainous landscape is now the setting for a terrifying kidnap plot targeting one of the other guests.

In the desperate hours that follow, Alex and Pip must call on all their years of negotiating experience to keep everyone alive. But with Pip gravely injured and the net closing in, it might be her life that needs saving most of all...