John Holland and his wife, Kate, are happy together until his book, "The Unseen Vengeance," makes him famous. It has been inspired by the story of a Russian girl, whose father, a political refugee, has been assassinated by government spies. She becomes a celebrated actress, and Holland, now the literary lion of the day, meets her at a social function and becomes infatuated with her. He deserts Kate for Olga, and vengeance pursues him in the guise of failure, remorse, illness, and finally, abandonment by the woman for whom he has sacrificed everything. Kate learns of his plight. Her love has been constant, and hers is a big enough nature to comprehend her husband's sincere repentance and forgive his weakness. She goes to him, and they are reunited.