Follow the exciting adventures of Commissioner Nayland Smith as he pursues Dr. Fu Manchu across the opium dens of Thames-side London and various country estates. "To-night! I had thought of turning in, I must admit. I have not dared to sleep for forty-eight hours, except in fifteen-minute stretches. But there is one move that must be made to-night and immediately. I must warn Sir Crichton Davey." "Sir Crichton Davey--of the India--" "Petrie, he is a doomed man! Unless he follows my instructions without question, without hesitation--before Heaven, nothing can save him! I do not know when the blow will fall, how it will fall, nor from whence, but I know that my first duty is to warn him. Let us walk down to the corner of the common and get a taxi."