The opera's setting is "A Pleasant Garden" in
Athens. While making their offerings to
Ceres, goddess of fertility, the maidens of Athens have been set upon and abducted by
pirates. Tirinto laments his lost love, Rosmene, while Argenio, an Anthenian
Senator, grieves for his daughter Clomiri, a friend of Rosmene. Imeneo appears and announces that he has freed all the captives. In order to get close to his love Rosmene, he had been part of the maiden group making offerings, disguised in women's clothes, and had been swept up in the abductions. He boasts that while the pirates slept, he took the opportunity to kill them all. There is general rejoicing, and when Imeneo demands to marry Rosmene in recognition of his great deed, Argenio and his fellow senators agree, telling Rosmene that it is her duty to accept Imeneo. Argenio attempts to persuade her of the power of gratitude by telling her the fable of
Androcles and the Lion, in which the lion gratefully kisses Androcles rather than killing him, recognising him as the man who had once removed a thorn from his paw. Rosmene, however, loves Tirinto, and is conflicted between faithfulness to him and duty and gratitude toward Imeneo. Clomiri has feelings for Imeneo, and flirts with him, suggesting that he should transfer his affections to someone who already deeply loves him. But he is resolute and pretends not to understand Clomiri's advances. Knowing that she must disappoint one of her suitors, Rosmene settles on a device for seemingly delegating the decision to a higher power. Feigning
madness, she enacts a vision of
Radamanto, one of the judges of the dead in the
underworld, who cuts out her heart with his sword. Her heart will choose for her, after hearing from both suitors. She 'faints', and on coming round declares for Imeneo. The chorus sings of the need to bow down not to passion, but to reason; one should not follow feelings and fidelity, but gratitude and honour. == History and text ==