Røskva and Tjalfe, two Viking boys, embark on an adventurous journey from Midgard to the fantastic kingdom of Valhalla along with the gods Thor and Loki. Life in Valhalla, however, is threatened by the feared wolf Fenrir and the gods’ bitter enemies, the Jotnar. Alongside the gods, the mortals Røskva and Tjalfe will fight against the darkness to save Valhalla from the end of the world: the Ragnarok.