Set in the early part of the twentieth century, the novel's main protagonist, Gabriel Syme is a Scotland Yard detective who's assigned to break the trend of anarchic groups mushrooming all over London. He hides his true identity and takes on the role of a poet. He meets Lucian Gregory, also a poet, and they become friends. One evening, they get into a passionate debate on the true function of poetry and whether it is a symbol of revolution. As the debate rages on, Gregory is incensed and indiscreet enough to confess that he is part of a secret group that espouses anarchy. The group meets in a remote public house in Chiswick on the banks of the Thames and Gregory invites Syme to join them that evening, to prove that he (Gregory) is indeed a true blue anarchist.
