Since her husband King Agamemnon left ancient Mycenae to sail with his army for Troy, Clytemnestra rules along with her lover Aegisthus. Together they plot the bloody murder of Agamemnon on the day of his return. Clytemnestra reveals how her husband deceived her eldest daughter Iphigeneia with a promise of marriage to Achilles, only to sacrifice her because that is what he was told would make the winds blow in his favor and take him to Troy. Agamemnon came back from war with a lover himself; now Clytemnestra will achieve vengeance. But her own fate lies in the hands of her son, Orestes, and her vengeful daughter Electra.