Set in the 10th Century, two young sons, named Erik (George Ardisson) and Eron (Cameron Mitchell), witness their parents murder at the hands of the English during a raid on their Viking village. Erik is taken by Queen Alice (Françoise Christophe) to England where she raises him as her own son, while Eron lives a bitter life as a recluse. Years later, the adult Eron plots with his Norse allies to attack England while, Erik, an English naval officer, is ordered to lead an attack against the Norse Vikings. When their paths cross allegiances to kin and country are tested.