In order to foil Alberich’s bid for power, the ruler of the gods Wotan has fathered nine Valkyries, who have the task of gathering an army of fallen heroes for him and bringing them to Valhalla. His intention is that his son Siegmund, conceived from a relationship with a mortal woman, will be the free-born hero who wins back the ring for him. However, Siegmund unwittingly upsets Wotan’s plan by falling in love with his twin sister Sieglinde, a union that gives birth to Siegfried. When Wotan’s favourite daughter Brünnhilde disobeys her father’s order to seal Siegmund’s downfall out of compassion, he banishes her to the rock of fire from which only the strongest hero will be able to rescue her. This will be Siegfried.