The Persian usurper Oronte has adopted a daughter of the murdered King Nino, Elmira, whom the victorious Thracian Prince Floridante, commander under Oronte, now expects in marriage. Oronte’s own daughter, Rossane, is wooed by a prisoner of Floridante, the Tyrian Prince Tomante, earlier in disguise. Floridante is expelled from the court, without apparent reason, but it then seems that Oronte intends to marry Elmira himself. Floridante returns, in disguise, planning, with Timante, that they should elope with the two girls. Their escape is foiled and Floridante is imprisoned. After further attempts by Oronte to have his way he is dethroned by Floridante and Elmira becomes Queen of Persia, with Floridante her husband and Oronte forgiven, while Rossane and Timante return together to rule in Tyre.
As with many of Handel’s operas, there were revisions for subsequent performances. The 13th of his operas and the eighth for the King’s Theatre, Floridante won some success, opening in London the third season of the Royal Academy of Music, founded with the support of King George I in 1718.