This story revolves around the Danish semi legendary 6th century King Rolf and his warriors, especially his main fighter Bodvar Bjarke, who according to some researchers, is identical to the warrior Beowulf in the Anglo-Saxon poem. There are many similarities between Beowulf and parts of Rolf Krakes story. They are suppose to take place at during the same era and both include the story of a brave warrior who kills a monster that haunts the hall of the Danish king. Possibly it´s in fact two versions of the same original legend.
The Saga of Rolf Kraki in English: