The storyline of the book is based on a life of Commander Evangeline Booth, who has been the source, the inspiration, the guide of this story. The book is a great account of the many lives that the Salvation Army lassies touched and led to the Lord. Unlike the most of Grace Livingston Hill's book this one does not have a romantic plot and rather is focused on a relationship between the U.S. Army and the Salvation Army during WWI.