Produced in 458 BC, Aeschylus' Choephori is the second play in the Oresteian trilogy. Many years after king Agamemnon's murder at the hands of his wife Clytamnestra and her lover Aigisthos, his son Orestes returns home with Pylades to mourn at his grave. He has been living in exile and has come back to Argos in secret; his mission is to avenge Agamemnon's death.