Richard Hannay is not sure what to make of an American he just met claiming he knows of an upcoming German plan to kill the Greek Premier while in London. Hannay reluctantly lets the man stay with him and when the man is found dead, Hannay knows the story was true. Now he is on the run from the police and the killers.
First published in June in All-Story Weekly (2 issues), then in July - September in Blackwood's Edinburgh Magazine (3 issues) before publication as a book in October, all in 1915.