After their airplane crashes in the wintry Hindu Kush, the survivors - Dr. Magnus, Will and several others - have at least five hours to wait until they can be rescued. Unfortunately, they were returning from an expedition to Tibet where they had captured a rare type of snow leopard. It escaped from its metal cage and is what caused the flight to crash. Now the creature is free and all of their lives are in danger. Dr. Magnus is also dreaming about John Druitt and other survivors are also seeing people from their lives. Magnus and Will soon realize that nothing is at is seems.