Die Walkure is the second of the four music dramas that constitute Richard Wagner's Der Ring des Nibelungen. The story of Die Walkure is based on the Norse mythology told in the Volsunga saga and the Poetic Edda. In this version, the Volsung twins Sieglinde and Siegmund, separated in childhood, meet and fall in love. This union angers the gods, who demand that Siegmund must die. Sieglinde and the couple's unborn child are saved by the defiant actions of Wotan's daughter, the title character, Valkyrie Brunnhilde, who as a result faces the gods' retribution.