It's a sunny afternoon, and you're deep in the country on a river trip with your family. You're nearing journey's end when a shot rings out - and your whole life changes in an instant. A woman is coming towards you, chased by three gunmen. It's clear she's in terrible danger. And now you are too. Because although you don't know it, she harbours a deadly secret. Night falls. You're running, terrified, desperate to find safety. All you know is that the men hunting you have killed before. And if they catch you, you'll be next.