Written in first person, this seems like a man's defense to himself of an act that has come to dominate the emotions of his life. An American joins the British Intelligence, takes on the identity of a German prisoner, and goes in his place to rejoin the German army. En route he meets an officer striving, against prejudice, to meet his men on a human plane. They become friends -- only to have their faith punctured when the ""spy"" has to use his friend's confidence in betraying him. The finale, with its tragic aftermath, has a certain poignancy. A story of a friendship.