Young Frederica Calhoun, naïve to the ways of the world, having grown up on her father’s Montana ranch, is swept off her feet by the arrival of Lord Cecil Grosvenor, a prospective buyer. He opens her eyes to a hitherto undreamed-of world of refinement and he by her unfailing sweet disposition and sunny bubbling good spirits. They are soon engaged, but during a trip to New York to visit his sister Frederica begins to let her doubts get the better of her and disguising herself as a man follows him to the French Ball, but all turns out well in the end.