King Agamemnon is murdered by his wife Clytemnestra and her lover, Agamemnon's cousin and childhood playmate, Aegisthus. Of Agamemnon and Clytemnestra's children, Orestes goes into exile for safety, while Electra is confined to the palace for some years and then forced to marry a peasant to disgrace her and any children.
Some years later, Electra seeks revenge with the help of her brother Orestes and their cousin Pylades. Orestes and Pylades attend a festival to Bacchus hosted by Aegisthus. When Aegisthus challenges Orestes to a mock knife fight, Orestes uses the opportunity to kill him. Electra invites Clytemnestra to her house under false pretenses. Despite Clytemnestra explaining her reasons for killing her husband and apologising for her actions towards Electra, Electra enables Orestes to stab Clytemnestra to death. In the end, the siblings feel remorseful and realise that they will be social outcasts for their actions. They depart in different directions.
