Opened at the Empire Theatre on December 2, 1912. Ran 120 performances, to about March 1913. The Firefly was the first operetta written by composer Rudolf Friml, with a libretto by Otto Harbach. The story concerns a young Italian girl, who is a street singer in New York. She disguises herself and serves as a cabin boy on a ship to Bermuda, where she falls in love. Complications arise, and eventually, she becomes a grand opera diva. Wiki link