Synopsis
When a fellow Jew is killed, Tobit (a Jewish man from Nineveh) chooses to break the law by giving him a proper burial. The next morning Tobit is blinded by a group of sparrows (played by a children's chorus) who throw their droppings in his eyes. Remembering that he is owed money by Raguel, a relative in Ecbatana, he sends his son Tobias to reclaim it. A stranger offers to help guide Tobias on his way. On the way, the stranger encourages Tobias, who is something of a good-for-nothing and only interested in dancing, to pay attention to the world around him - to listen to the songs of the trees, the mountains, the river. In the river, they are attacked by a giant fish. Hearing its hidden song, Tobias is able to overcome it, and the stranger tells him to take its heart and gall.
In Ecbatana, meanwhile, Sara, Raguel's daughter, is held under the spell of a devil, Ashmodeus, who kills her husband on their wedding night. When Tobias arrives, he falls in love with Sara. The stranger, however, has eyes only for the unseen devil, and he instructs Tobias to use the fish's heart to break Ashmodeus' spell. This enables Tobias to wed Sara without being killed, and they return to Nineveh. Tobias uses the gall to cure Tobit's blindness, and the stranger reveals himself as the angel Raphael.
Read more about this topic: Tobias And The Angel (opera)