The Biggest Loser Germany started in 2009 on ProSieben. The following seasons switched channels inside the ProSiebenSat.1 network, season two airing on kabel eins and seasons three and four on Sat.1.

The young blacksmith Siegfried, who, not knowing that he is heir to a conquered kingdom, becomes popular with the Burgunds by slaying their bane, the dragon Fafnir. When the reward seems to be a huge treasure, Siegfried ignores the curse that lies on the hoard - which now seems to endanger his love to beautiful Norse warrior queen Brunhild.