"Somewhere in twenty million acres of forest and glaciers, a ranger has disappeared: Mark Miller. Missing six weeks. It's assumed by the Alaskan Parks Department that Miller has been caught in a snowstorm and frozen to death: the typical fate of those who get lost in this vast and desolate terrain. But as a favour to his congressman father, the FBI send in an investigator: Ken Dahl. Last heard from two weeks and two days ago. Now it's time to send...