La Sonnambula is a work that has not entered the consciousness of the general opera-going public in the manner of its contemporaries like Lucia di Lammermoor, Il Barbiere di Siviglia and Norma, Bellini’s most famous work. The Met had not performed the piece since 1972, and, frankly, few were clamoring for it. The story concerns Amina (Dessay), a Swiss village girl, engaged to fellow villager.