A monstrous sea serpent is terrorizing the Fjördland, destroying one fishing boat after another, eating all on board, and keeping the Vikings from going on their pillaging expeditions. All hope seems lost until a stranger with a dark past and a score to settle with the gods shows up and offers to hunt down and slay the Krökken for a thousand silver talents. Soon a ragtag group of would-be monster hunters boards a drak and, against a divine, ominous Nordic background of lakes and mist and mountains, sets sail on a perilous mission not all will survive.

Asgard, the fallen viking with the iron leg, and Sieglind, a slave girl seeking to change her destiny, trek through the deadly winter landscape with the voracious Krökken in relentless pursuit, struggling to stay alive and to understand why the gods that have already taken so much from them refuse to let up and ease their suffering.