Agamemnon, King of Mycenae, returns home seven years after the Trojan War. Waiting at home in Argos is his wife, Queen Klytaimestra, who seeks revenge for the sacrifice of their daughter Ifigeneia.
Agamemnon's son Orestes returns to Argos to exact vengeance on his mother Klytaimestra, as an order from Apollo. Upon arriving, Orestes reunites with his sister Elektra.