In this opera, two worlds collide as Cio-Cio-San, a young girl in Nagasaki, falls for Pinkerton, a reckless American officer. His love is tender, but shallow, as he is called away to a new adventure only a few days after their wedding. Her deep love is true and faithful, and she believes in the promise of his return. Unfortunately, the future brings only heartbreak, regret, and tragedy.