In Edwardian era London, Gabriel Syme is recruited at Scotland Yard to a secret anti-anarchist police corps. Lucian Gregory, an anarchistic poet, lives in the suburb of Saffron Park. Syme meets him at a party and they debate the meaning of poetry. Gregory argues that revolt is the basis of poetry. Syme demurs, insisting the essence of poetry is not revolution but law. He antagonizes Gregory by asserting that the most poetical of human creations is the timetable for the London Underground. He suggests Gregory isn't really serious about anarchism, which so irritates Gregory that he takes Syme to an underground anarchist meeting place, revealing his public endorsement of anarchy is a ruse to make him seem harmless, when in fact he is an influential member of the local chapter of the European anarchist council. The central council consists of seven men, each using the name of a day of the week as a cover name; the position of Thursday is about to be elected by Gregory's local chapter. Gregory expects to win the election but just before, Syme reveals to Gregory after an oath of secrecy, that he is a secret policeman. Fearful Syme may use his speech in evidence of a prosecution, Gregory's weakened words fail to convince the local chapter that he is sufficiently dangerous for the job. Syme makes a rousing anarchist speech and wins the vote. He is sent immediately as the chapter's delegate to the central council.