Married to a spy who seeks to induce her to betray her country, the daughter of the American Ambassador to Belmark welcomes the news of her husband`s death not knowing that he has merely staged a deception. She becomes the morganatic wife of Prince Leopold, of Belmark, but renounces the marriage that war may be avoided, only to learn that the new alliance means a still greater war. She persuades Leopold to renounce the compact, then saves his life by throwing herself between him and an exploding bomb, but the story does not end there.