 Clytemnestra, outraged after having at last received her husband's message from Arcas, tells Iphigénie that they cannot stay, Achille having reportedly chosen not to marry her because of Eriphile.Distraught with grief at her cruel and vicious betrayal by Eriphile, Iphigénie leaves dejectedly on being discovered by Achille.In turn astonished and confused by her presence in Aulis, Achille expresses his dismay at the efforts of the Greek leaders to prevent his marriage.