Casimir, prince and general of the Hungarian army, being unfortunately defeated in a war between him and Osmyn grand visier of the Turks, is taken prisoner. Upon the arrival of this unhappy news, Amelia, Casimir's wife, resolves to try all possible means to effect his redemption; accordingly she advises Rodulpho, a young prince, and an intimate friend of Casimir, to dress himself in a Turkish habit, and present her to Osmyn as a captive taken by him, imagining that if she could be brought into the presence of the grand visier, he would be so deeply captivated with her beauty, that she could easily induce him to grant any favour, upon a seeming condescension to any thing he should ask of her in return: with this view she is carried to Osmyn, upon whom she had the influence she promis'd herself, and compleated the redemption of her husband. Amelia having thus successfully obtained her desired ends, soon after meeting with a good opportunity, when Osmyn was engaged in other affairs, makes her escape with Rodulpho by night, and disappoints the grand visier of his expectation. Augusta, Casimir's sister, all this while missing Amelia, and Rodulpho her lover, supposes they are gone upon some vicious design; and Casimir himself not finding them at home at his return, concurs with her in the same opinion, so that upon her coming back they meet with a reception much contrary to what they might naturally hope for after so dangerous an adventure, being both instantly put into confinement: Amelia so highly resents this undeserved usage, that she advises Rodulpho not to give Casimir any immediate satisfaction about their undertakings; but Rodulpho finding that such a delay would be of dangerous consequence (a day being already fix'd for their execution) resolves to conceal it no longer, but in a letter to Casimir gives a genuine account of all their proceedings, the truth of which he is so well convinced of, that he is instantly reconciled to both his deliverers, and gives Augusta to Rodulpho in marriage as a gratuity for his extraordinary friendship.