In the first opera in the Ring cycle, the gods of Valhalla clash with underworld dwarves and brawny giants, with disastrous consequences. The evil Alberich steals gold from the Rhine and uses it to forge a ring of unimaginable power. Wotan, the king of the gods, uses magic to steal the ring, but Alberich places a curse that guarantees misery for whoever wears it. Wotan’s unwillingness to part with the ring leads him to break a contract with the giants who have built the gods’ new castle in the sky, setting in motion a chain of events that will end in his own destruction.

The mysterious hero Siegmund finds shelter in the strangely familiar arms of a lonely woman named Sieglinde. Their forbidden love leads Wotan’s daughter, the warrior maiden Brünnhilde, to defy morality and intervene on behalf of the hero. Brünnhilde’s transgression forces her father to choose between his love for his favorite daughter and his duty to his wife, the formidable goddess Fricka. Overcome with grief, Wotan takes away Brünnhilde’s godlike powers and puts her to sleep on a mountaintop, surrounded by a ring of magic fire that can only be crossed by the bravest of heroes.

The young hero Siegfried grows up in the wilderness, raised by Alberich’s conniving brother Mime. He puts together the broken pieces of the sword Nothung, uses it to slay the fearsome dragon Fafner, and takes the ring for himself. To fulfill his destiny, he must overcome one more opponent—Wotan, now disguised as the Wanderer, who knows the world of the gods is coming to an end—and cross through the magic fire to awaken his true love, Brünnhilde.

Siegfried and Brünnhilde’s love is torn apart by the curse of the ring. A trio of scheming humans separates the two heroes in a desperate attempt to steal the ring for themselves. Their villainous plan fails, but they succeed in murdering Siegfried. Heartbroken, Brünnhilde takes the ring and leaps into the hero’s funeral pyre, causing a global cataclysm and the twilight of the gods.