A ferocious Arctic storm drives them beyond all known waters, and when the ice finally parts, Tom and the motley crew discover something impossible: a vast opening at the pole leading down into the very center of the Earth. Within this strange new world—where the sun rises in the west and Vikings rule ancient plateaus—Tom must navigate shifting loyalties, outwit murderous rivals, and protect a girl disguised as a cabin boy. But Scarface has grand ambitions for conquest in this lost realm, and not everyone aboard will survive the voyage into the unknown.
Can Tom find a way to escape before Scarface's schemes doom them all?