Aristée enters. Though seemingly a shepherd he is in reality Pluton (Pluto), God of the Underworld. He keeps up his disguise by singing a pastoral song about sheep ("Moi, je suis Aristée"). Eurydice has discovered what she thinks is a plot by Orphée to kill Aristée – letting snakes loose in the fields – but is in fact a conspiracy between Orphée and Pluton to kill her, so that Pluton may have her and Orphée be rid of her. Pluton tricks her into walking into the trap by showing immunity to it, and she is bitten. As she dies, Pluton transforms into his true form (Transformation Scene). Eurydice finds that death is not so bad when the God of Death is in love with one ("La mort m'apparaît souriante"). They descend into the Underworld as soon as Eurydice has left a note telling her husband she has been unavoidably detained.