The Viking children Røskva and Tjalfe embark on an adventurous journey from Midgard to Valhalla with the gods Thor and Loki. Life in Valhalla, however, turns out to be threatened by the dreaded Fenrir wolf and the god's barbaric archenemies, the Jotnar. Side by side with the gods the two children must fight to save Valhalla from the end of the world - Ragnarok.

Jul i Valhal is a Danish television advent calendar. It first aired in the December 2005 on TV 2 Denmark television station, on TV 2 Norway in December 2006 and in December 2007 on the Swedish Barnkanalen. In 2008 it is being aired in Finland on Yle2. As a television advent calendar, it has 24 episodes, and one new episode was aired per day from December 1 to December 24. Jul i Valhal is primarily about two children named Jonas and Sofie, and their adventures with the Norse gods.