As One is a chamber opera in which two voices—Hannah younger and Hannah older—share the part of a sole transgender protagonist. Fifteen songs comprise the three-part narrative; with empathy and humor, they trace Hannah’s experiences from her youth in a small town to her college years—and finally traveling alone to a different country, where she realizes some truths about herself.

Commissioned by the American Opera Project, As One opened on September 4, 2014, at the Brooklyn Academy of Music's Fisher Space. Since its premiere, it has become the most produced new opera in North America, according to Opera America magazine.