But when, deep into the journey, a boy is discovered brutally killed, Sumner finds himself becoming a reluctant detective. Soon he will face an evil even greater than that he had encountered at the siege of Delhi, in the shape of Henry Drax: harpooner, murderer, monster.
As the true purpose of the ship's expedition becomes clear and despair descends upon the crew, the confrontation between Sumner and Drax will play out in the terrible darkness of the Arctic winter . . .