January 1937 - Jack is offered the chance to join an Arctic expedition. He and his team reach the remote, uninhabited bay where they will camp for the next year, but the Arctic summer is brief. As night returns, Jack feels a creeping unease. One by one, his companions are forced to leave. He faces a stark choice: stay or go. Soon the polar night engulfs the camp in months of darkness and he reaches the point of no return - when the sea freezes, making escape impossible. Gruhuken is not uninhabited. Jack is not alone. Something walks there in the dark...