A wild dancer in a cheap Seville cafe, Mariposa is taken to New York by Señor Sprott, a prominent theatrical producer. Billed as "The Charmer," Mariposa becomes the toast of two continents. Among her most ardent admirers are Ralph Bayne, a millionaire playboy, and his chauffeur, Dan Murray, both of whom first met her in Spain. Madly in love with Bayne, Mrs. Sedgwick invites Mariposa and her mother to a weekend party in a deliberate attempt to humiliate the beautiful dancer. Bayne quickly realizes that Mariposa is out of place in high society, and, determining to make her his mistress, takes her home with him. Mrs. Sedgwick unexpectedly arrives at Bayne's swank suite ( followed by her suspicious husband), and Mariposa protects the society woman's reputation at the cost of her own.