Dr. Jonathan Ransom, world-class mountaineer and surgeon for Doctors Without Borders, is climbing in the Swiss Alps with his beautiful wife, Emma, when a blizzard sets in. In their bid to escape the storm, Emma is killed when she falls into a hidden crevasse. Twenty-four hours later, Jonathan receives an envelope addressed to his wife containing two baggage-claim tickets. Puzzled, he journeys to a remote railway station only to find himself in a life-and-death...