Watch Sadisflix. Antonio Pappano conducts a full performance of the second opera in Richard Wagner’s epic Der Ring des Nibelungen. During a storm, Sieglinde gives shelter to a wounded stranger. They find themselves drawn to each other. He is Siegmund, the twin from whom Sieglinde was separated in childhood. Unknown to them, their father is Wotan, the most powerful of the gods. Through Siegmund, Wotan hopes to retrieve a gold ring of ultimate power that he cannot take himself.