A Chinese Secret Society that has sworn to obtain by fair means of foul all important scientific inventions of the world, sends two fellow conspirators, Li Sun Wu and Wing Chang, to London to endeavor to obtain possession of two inventions that they have heard of, viz: a metal stronger than steel and one-tenth its weight (the inventor of which in order to prove its worth has had an airship made of this steel), the other, the true elements of electricity. On their arrival in London they take a house next door to that occupied by Rex Omar, a scientific and criminal investigator with wonderful occult powers. The following day they call upon Dr. Wincott Lane, the inventor of the true elements of electricity. He shows them over his laboratory, despite the warning of his daughter, who is suspicious of their intentions. Rex Omar, who has also paid the inventor a friendly visit, overhears the conversation of the Chinamen, and decides to attend the meeting of the Secret Society which they have arranged. Before leaving his house, he mesmerizes his Hindoo medium, Lola, and places her in front of her magic mirror. Arriving at the Chinese Club, he sandbags the doorkeeper, and takes his place until all the members have arrived. He then attends the meeting, but is discovered by Li Sun Wu. The Chinamen decide upon a cruel revenge, and brings forth their torture clock. Rex Omar’s head is placed through an aperture in the clock face, the hands of which are swords as keen as razors. The clock is set going and the hands are seen to gradually go round on their fateful and bloody work. By means of hypnotic telepathy, he sends a message to Lola, who sees all that is going on at the Chinese Club, and she loses no time in informing the police. Nearer and nearer the fatal hands are getting to the victim’s neck, but the police arrive in the nick of time, and affect a rescue. The Chinamen, however, have not given up their object, and now plan to obtain the model of the airship. John Hartsdale, the inventor, is giving the model a trial flight round his laboratory, and with satisfaction packs it away carefully in the safe. He is, however, watched by envious eyes, which prove to be those of a Chinese spy. As soon as Hartsdale leaves the room, the spy enters, and depositing a drugged newspaper on the table exits quickly by the window. Hartsdale’s footman enters the room and commences to read the paper, is overcome and falls prostrate on the floor. The inventor hearing the fall rushes in and is himself slightly overcome. While the victims are lying on the floor, apparently dead, the Chinamen enter and kidnap Hartsdale, and steal his invention. Lola sees what has happened, and Rex Omar, disguised, waits outside Chinese headquarters until one of the gang comes out in search of a doctor whose services are required to bring Hartsdale to his senses. He directs the Chinaman to one, and by a short cut Rex Omar arrives at the doctor’s first. He is allowed to impersonate the doctor and thus gains admittance to the Chinese Club. The doctor prepares to prescribe for his patient, and taking hold of Hartsdale’s wrist taps a message in Morse Code to keep quiet as he is a friend. He informs the Chinamen that the only way of restoring the patient is by means of electricity in high voltage for which they must have access to an electric generating station. They are conveyed to the nearest one, and overpowering the assistants, take charge. The doctor is ordered to the switch which floods the whole town with the message that the electric generating station is held up by a gang of Chinese. The news is conveyed to the police, who rescue Rex Omar and Hartsdale at a critical moment, and arrest the Chinamen. Rex Omar discovers the secret of the drugged newspaper, and by injecting a very rare Eastern drug neutralizes the poison and the patients recover.