Götterdämmerung

Before leaving in search of adventure, Siegfried gives the ring to Brunnhilde for safe-keeping as a symbol of their love. Soon he arrives at the hall of the Gibichungs. Alberich incites his son Hagen to help him regain the ring, which Hagen does with the unwitting aid of his half-brother and sister, Gunther and Gutrune. Hagen drugs Siegfried, causing him to forget his devotion to Brunnhilde, and he falls in love with Gutrune instead. Siegfried then tricks Brunnhilde and takes back the ring.