A group of New Age trekkers in Tibet are trapped in a cave by a snowstorm and stumble across a mutilated, mummified corpse, covered with cryptic tattoos in both English and undecipherable symbols; the party interprets the former to mean that the body was that of a RAF pilot who had crashed on the other side of the Himalayas in the 1940s. How the pilot had made it across the mountains is a mystery, but a diagram among the tattoos suggests that the cave the party is trapped may be part of a larger network, one that might have an outlet elsewhere. As the blizzard shows no signs of letting up, the party pushes deeper into the network, discovering the remains of a slaughtered ancient army, displayed almost trophy-like, and a trail of gold coins. Becoming separated, the members are relentlessly killed by an unseen enemy, until only the mountain guides, Ike and Kora, remain.