Vikings pillage Ireland, seeking silver and slaves, slaying men and women in the process. A young boy is spared when a Viking takes pity on him instead of killing him. Twenty years later the boy returns to Iceland take his revenge.
The Swedish 19th century engineer Salomon August Andrée sets out to become the first man on the north pole. His idea is to launch a polar expedition using a hydrogen balloon, together with two friends. The balloon, "The Eagle", takes off from Svalbard in 1897, but the three men are never heard from again.
Trausti returns to Iceland just in time to be entangled in a family feud over a stranded whale-cadaver. His mother (the family head) is mortally wounded and Grim kills Erikur; the other clan leader. Isold, daughter of Erikur now takes his place. Isold and Trausti are attracted to each other, but Isold was promised to Hjoerleifur - the son of the Bishop (of Iceland) and his powerful wife. However, Isold has a plan...
