From the terrace of Herod’s palace, Narraboth, captain of the guard, gazes rapturously inside at Princess Salome, who is feasting with her stepfather and his guests. The voice of the prophet Jochanaan echoes from a deep cistern, where he is imprisoned by Herod, who fears him. Salome, fleeing Herod’s lechery, rushes out for fresh air and becomes curious when she hears Jochanaan curse her mother Herodias. When the soldiers refuse to bring Jochanaan to her, Salome convinces Narraboth, who orders that Jochanaan be summoned. Jochanaan and Salome meet as he denounces the incestuous union of Herod and Herodias. She is increasingly overcome by desire, praising his body, hair and mouth. When Salome begs for Jochanaan’s kiss, Narraboth stabs himself in horror. Jochanaan urges Salome to seek salvation in the Messiah.

Herod and Herodias appear. Herod’s thoughts turn to Salome, who spurns his attentions. He begs Salome to dance for him and offers her anything she might wish in return. Salome makes him swear he will live up to his promise, then dances. Salome demands the head of Jochanaan on a silver platter, ignoring Herod’s alternatives – jewels, rare birds, a sacred veil. Terrified, Herod finally gives in. After a tense pause, Salome has her wish: the head of Jochanaan. Salome seizes her reward, triumphantly kissing his lips. Herod orders Salome to be killed.