Dr. Yu Tsun, a Chinese national and a former professor of English, reveals in his statement that he is a German spy. He recounts the events leading to his arrest, beginning with when he discovers that his contact has been killed. He knows he must devise a way to get an important message to the Germans. He looks in a telephone book and finds the name of a man, Stephen Albert. Yu Tsun thinks Albert will be able to help, although he does not reveal how he knows this.

Yu Tsun then recounts how he travels to Dr. Albert's house, pursued by Captain Richard Madden, an Irishman in service to the English. When Yu Tsun arrives, Dr. Albert mistakes him for a Chinese consul that he knows; Dr. Albert assumes that the Chinese man is there to view his garden. Yu Tsun discovers that Dr. Albert...