The Norse winter has been cruel to the the family of baby Modi. His family is starving to death, and when a stranger seeks shelter from the winter storm and hospitality, they provide it, even though they haven't enough to eat themselves. The stranger is a god in disguise, and in thanks for the food, weaves a spell on baby Modi, giving him the strength of the Gods. The catch is that he can never wield a weapon or his soul will be forfeit.
Modi's family prospers, and he grows to adulthood, but one day a storm giant kills his parents, and Modi swears vengeance against the Gods.