Mycenae, in the inner courtyard of the palace. Once upon a time, King Agamemnon was slain here in the bath by his wife (Clytemnestra) and her lover (Aegisthus) after his return from Troy. His daughters Electra and Chrysothemis have been held as prisoners ever since. Their brother Orestes is on the run. Uncertainty and panic reign. As she does every day, Electra enacts her ritual — she remembers her dead father: “Where are you, father?”. Blood vengeance is her goal. Her sister Chrysothemis appears with a warning: they want to lock Elektra away in the tower, to silence her for good. Now, Electra calls Chrysothemis to perform the deed: they must slay their mother and her lover with the axe that once smashed their father’s head. Chrysothemis does not seek revenge, she seeks a normal life: “I am a woman and want a woman’s destiny”, she wants to give birth and have children. Electra’s contempt puts an end to their exchange: “Why are you crying? Away! Inside!”
Unrest breaks out in the palace. The queen is plagued by nightmares. She seeks help from her “clever” child, Electra. Mother and daughter face each other painfully. Clytemnestra seeks a remedy to alleviate her nocturnal woes. Electra answers her: the appropriate blood sacrifice, performed by a man with an axe, could free her from her nightmares. She torments her mother with the threat of death and the hope of Orestes’ return. The mother withdraws, distraught.
News arrives that Orestes has been struck dead by his horses. The mother exults, Electra does not want to believe it, Chrysothemis breaks down in despair. Electra now wants to take revenge herself. She takes out the hidden axe. Suddenly a strange man stands before her, saying he is a companion of her dead brother. At first, the siblings do not recognise each other. But his shock at seeing Electra’s condition drives Orestes to reveal his identity. The floodgates of pain and rapture open as sister and brother recognize each other.
They agree on what must happen: “Those at whose bidding I have come, / The gods, they will be there to help me.” Orestes, accompanied by his guardian, enters the palace and kills his mother.
The court is thrown into turmoil. The returning Aegisthus is escorted into the palace by Electra with feigned courtesy. He too is slain by Orestes. Chrysothemis calls Electra back to the palace for the celebration. Electra is exhilarated about herself and her deeds: “I have sown the seeds of darkness and reap joy upon joy”. In a wild voice, she calls for a dance and like a maenad, she dances herself blissfully to death.