Composer Nico Muhly unveils his second new opera for the Met with this gripping reimagining of Winston Graham’s which also inspired a film by Alfred Hitchcoc novel, set in the 1950s, about a beautiful, mysterious young woman who assumes multiple identities. k. Mezzo-soprano Isabel Leonard sings the enigmatic Marnie, and baritone Christopher Maltman is the man who pursues her—with disastrous results. Robert Spano conducts. Director Michael Mayer and his creative team have devised a fast-moving, cinematic world for this exhilarating story of denial and deceit,