They are isolated - but they are not alone . . . When a deadly snowstorm strikes the Icelandic highlands, four friends seek shelter in a tiny, abandoned hunting lodge. A terrifying discovery . . . Far from offering relief, however, they find something truly shocking. Yet they dare not leave. A haunting darkness . . . As the night lengthens, their fears intensify. Old secrets and past tragedies spill into the light. And, slowly, these four friends begin to turn on one another. Outside, a murderous storm rages. But is inside even deadlier?