Eugene O'Neill's updated version of the Orestaia. In New England, after the American Civil War, a war-weary Ezra Mannon comes home to his unhappy wife (Christine) and loving daughter (Lavinia). But Lavinia's ex-suitor, Adam Brant, has become Christine's lover, and together Adam and Christine plot to poison Ezra. When they succeed, Lavinia turns to her brother Orin to help bring the lovers to justice, but when they succeed, Orin goes mad and his suicide note may come between Lavinia and her new suitor, Peter Niles.