As World War III rages, the scientists in Antarctica are thankful for the isolation—until a group of Chinese scientists arrive at the American research base. In their truck is a dead body, the first murder in Antarctica. The potential for a geopolitical firestorm is great, and, with no clear jurisdiction, the Americans don't know what to do. But they soon realize the Chinese scientists have brought far more with them than the body…

Within seventy-two hours, thirteen others lie dead in the snow, murdered in acts of madness and superhuman strength.

An extremophile parasite from the truck, triggered by severe cold, is spreading by touch. It is learning from them. Evolving. It triggers violent tendencies in the winter crew, and, more insidiously, the beginnings of a strange symbiotic telepathy.

Exhausted by suspicion and fear, with rescue impossible for months, the desperate crewmembers turn on each other. A small group of survivors try to resist the siren call of the growing hive mind and stay alive long enough to solve the mystery of the symbiotic microbe's origins. But the symbiote is more than a disease—it is a biological weapon that can change the balance of power in a time of war.

The survivors cannot let anyone infected make it to the summer season, when planes will arrive to take them–and potentially the symbiote—back to civilization.