The plot of reinaldo is about the first crusade against Jerusalem. The story of the famous Italian knights under Godefroy de Bouillon, one of the four famous crusaders (King of Jerusalem in the first generation of the Cross Army), besieging the city of Jerusalem. Knight rinaldo fell in love with commander Goffredo's daughter Al Milena, who agreed to their marriage after winning the battlements. On the other hand, Al Gunter, the commander of the Islamic and Jewish guarding city, was forced by the strong siege pressure to ask the commander of the Crusader for a truce and went to the Crusader camp to negotiate (Act I, Scene III). At this time, Al Gunter sang a famous aria [Sibilia Gayle An Gui]. In fact, it has reached the end of its rope, but with the triumphant baroque music as the background, the rich bass is also the only powerful role in this play. In this respect, baroque works are quite interesting. Goldfried severely rejected it with a famous aria [no, no, che quest'alma]. Al Gunter decided to ask for help from his lover, Almida, a witch from Damascus ... At this critical moment, Almida, a witch, appeared with a thunderous soprano aria [furie terribili]. Al Gunter turned to the witch Almida for help, and Almida readily agreed to help Al Gunter. Both of them talked about protecting the rivers and mountains in Asia, which is a soprano aria (Act I, Scene 5). To tell the truth, as orientals, some people are moved by these two little people. The [Augelletti che cantate] played by Al Milena is also a famous soprano aria, especially the songs of birds, clarinets and bands played in the overture are quite beautiful. Then there is a duet between rinaldo and Al Milena. In Handel's time, the role of rinaldo was played by Castrato, whose range should be two octaves of alto. Later, after the eunuch disappeared, he was generally replaced by a "tenor." So this is a love duet aria between tenor and soprano, which is quite beautiful and famous. In Rene Jacobs' performance, Mazo Soprano was used, so this famous love aria duet became a soprano and soprano duet. Almida enchanted Almilena and captured her. Angry rinaldo was furious because his lover was captured by the enemy (Act I, Scene VII). At this time, rinaldo sang an aria of missing his lover [cor ingrato], which was quite touching under the background of basso continuo composed of bass stringed instruments and harpsichord. Goldfried's younger brother Eustacio, also a Christian wizard, offered to help Goldfried and rinaldo find Al Milena.

Almilena was arrested in Al Gunter, and she was depressed. At this point, Al Gunter met Almirina, and immediately rose the mind of love. Then he sang a bass aria [basta che sol tu chieda] (Ah! Beauty, you are by no means unfortunate. Among them, a song by Lascia Ch 'io Milena became a famous soprano aria (Act II, Scene 4). ..... Almida used black magic again and captured rinaldo. In front of the temptress, rinaldo insisted on giving Al Milena back to him, or he would be buried with his sword. The witch was moved by reinaldo's bravery and turned herself into Almirina by magic. She seduced rinaldo and never thought that rinaldo wouldn't give in. At this time, Almida had an aria [Ah, Crudele], which showed his inner love for rinaldo and his anger at the other party's intransigence. This is also a dramatic and dramatic aria. ..... When Almida became Almirina, it attracted Al Gunter's misunderstanding. When Al Gunter saw that it was Almirina, he courted her and poured out his love. This annoyed Almida. Al Gunter realizes that Almida thinks it's not over yet (Act II, Scene 9). The last aria in the second act [Vo'far guerra] is a song by Almida, which expresses the feeling of being used and betrayed by lovers. There are three impromptu solos of plucked clavichord in the tune, which was also added by Handel in the first performance of the play to reveal the acting skills of the keyboard soloist.

Angry Almida wants to kill Al Milena and rinaldo. First of all, when he wanted to kill Al Milena, rinaldo asked to kill himself first. Almida doesn't want to. Just as he was about to do this, Christian wizards arrived. They blew up Almida's palace and saved rinaldo and Almilena in danger. Al Gunter and Almida were arrested at the same time. As a result, the battlements were "liberated" and lovers finally had a happy ending. Moreover, pagans like Al Gunter and Almida were baptized again, changed their religious beliefs, and resumed their relations with each other, which can be described as "turning over a new leaf".