Following triumphant Met turns in Romeo et Juliette, La Traviata, and Lucia di Lammermoor, Nadine Sierra summits another peak of the soprano repertoire as Amina, who sleepwalks her way into audiences' hearts in Bellini's poignant tale of love lost and found. This new production retains the opera's original setting in the Swiss Alps but uses its somnambulant plot to explore the emotional and psychological valleys of the mind.