A runaway train. A killer out for revenge. US Marshal Arliss Cutter is assigned to security detail for Supreme Court Justice Charlotte Morehouse and her teenage daughter, Ramona. It’s a routine task – until the family decide to explore the wilderness on the famous Glacier Discovery train. Hiding onboard are Chechen terrorists, who launch a surprise attack. While they seize control of the engine, Cutter manages to escape with Justice Morehouse by jumping off the moving train – and into the unforgiving wilderness. With no supplies and no connection to the outside world, Cutter and the judge must cross a treacherous terrain to stay alive. But Ramona is still on the train. And the terrorists plan to execute her live on camera... An unputdownable thriller set in one of the world's most unforgiving climates, perfect for fans of Adam Hamdy and Lee Child.