A European princess arrives in New York City to secure a much-needed loan for her country. She contracts the mumps, and an actress who looks exactly like her is hired to impersonate her.
Pinkerton marries Cho-Cho San in Japan, whilst on shore leave. When he leaves, she keeps his Japanese home as he left it. He returns three years later, having married again in America, and tells Cho-Cho that their affair is over. She has had a child in his absence, who is sent to her family, before she kills herself.
Naval commander Charles Sturm has made life miserable for his wife Diana due to his insane jealousy over every man she speaks to. His obsessive behavior soon drives her to the arms of a handsome lieutenant. When Charles learns of their affair, he plots revenge.
