After witnessing the assassination of his father, King Aurvandil War-Raven (Ethan Hawke), young Amleth (Oscar Novak) runs back to town only to find his murderous uncle Fjölnir the Brotherless (Claes Bang) taking his mother, Gudrún (Nicole Kidman), to be his queen next to him on his usurped throne of the 9th century Viking Village.  The…