Plot

During the Great War, German and Japanese spies face off in the United States.

Dr. Ebell Smith's real name is Schmidt and he is a German secret agent working on the West Coast of the USA. One of his associates is Kitty Little, a young woman who idealizes both Germany and her brother, who is in the Kaiser's army. They have been obtaining American military secrets through their contact with Major Northfield, who is in charge of a quartermaster depot. Nara-Nara, a young man serving in the secret service of Japan, which is allied with the USA, knows that there is a security leak in Northfield's office. An important troop transport order is soon to come through, and Smith abducts Northfield's secretary so that Kitty can take her place. Meanwhile, Nara-Nara sets up an office as an importer next to Northfield's office, in hopes of learning how the Germans are obtaining their information.—Snow Leopard

"The Secret Game" is a romance of the Secret Service in which Nara-Nara, a Japanese detective, works to save from destruction the American transports that are secretly carrying American troops across the Pacific to surprise the enemy on the Russian front. Japan has guaranteed safety to these transports, and it is for the honor of his country that Nara-Nara is put on the job. It has become known to the Secret Service that there is a leak somewhere in official circles and this leak has been traced to the office of Major Northfield, U.S. Quartermaster of the Pacific Coast. The American Secret Service has declared Major Northfield to be above suspicion, but, nevertheless, Nara-Nara resolves to watch him. The truth of the matter is that Kitty Little, a stenographer in Northfield's office, is the real "leak" through which important news is reaching the enemy. She is a girl of German parentage, who has a brother in the German army. She is working under the direction of a so-called Dr. Smith, who, under the cloak of being a physician, sees his agents as patients. It is Dr. Smith who procured the position for Kitty in Northfield's office. He it is also who invites Kitty and Miss Loring, Northfield's private secretary, to a little dinner, during the course of which he so drugs Miss Loring's coffee that she loses consciousness. Kitty is promoted to Miss Loring's position where she has access to all the important documents. At about this stage in affairs, when Nara-Nara does not know whom to suspect, but still believes Northfield himself to be the traitor, the latter falls in love with Kitty and declares It. Kitty then wants to resign, but Dr. Smith will not permit it. He tells her that if she turns traitor now Miss Loring's "illness" will end disastrously. Dr. Smith obtains the date of the next transport order. This he telephones to Kitty when it happens that Northfield is in Nara-Nara's office and standing near the microphone which permits him to hear all that is said in his own office. He learns that Kitty is a spy, albeit a reluctant and broken-hearted one. When the transport order comes through, he gives Kitty a blank sheet in an envelope to mail, if she is honest, or to give her confederates if she is the spy he now believes her to be. Nara-Nara follows her with it to Dr. Smith's house and sees her deliver it. Thinking only of his country's honor, Nara-Nara springs upon Dr. Smith as soon as Kitty has left him in search for Miss Loring. Dr. Smith is killed by Nara-Nara. The Japanese meets Kitty and realizes his great affection for her in spite of everything, but sacrifices himself for her, committing suicide rather than betray her to the police or prove false to his high principles. Northfield enters and, not knowing that a letter from her brother in which he tells her to forget about this "righteous" war and to thank God she is not in Germany, has made Kitty turn with all her heart to the United States which has received her with open arms and which is, after all, her country, turns her over to the police who, by this time, have been sent for. The blank order saves Kitty, and the last we see of the two, they are saluting the flag which they see through a glass is being run up on the transports which are steaming out of the harbor to safety.