From left: James Courtney, Disella Larusdottir, Peabody Southwell, Isabel Leonard, Deanna Breiwick, Rebecca Ringle Kamarei and Denyce Graves in the opera "Marnie" at the Metropolitan Opera in New York, Oct. 12, 2018. The composer Nico Muhly seized on Winston Graham’s 1961 novel “Marnie,” which inspired Alfred Hitchcock’s strangely stylized 1964 film, as an intriguing subject for an opera. (Sara Krulwich/The New York Times)