Based on Thomas Killigrew's play Thomaso, or The Wanderer (1664), The Rover features multiple plot lines, dealing with the amorous adventures of a group of Englishmen in Naples at Carnival time.
The "rover" of the play's title is Willmore, a rakish naval captain, who falls in love with a young woman named Hellena, who has set out to experience love before her brother sends her to a convent. Complications arise when Angellica Bianca, a famous courtesan, falls in love with Willmore and swears revenge on him for his betrayal.
Meanwhile, Hellena's sister Florinda attempts to marry her true love, Colonel Belvile, rather than the man her brother has selected. The third major plot of the play deals with the provincial Blunt, who becomes convinced that a girl has fallen in love with him but is humiliated when she turns out to be a prostitute and a thief.