London, 1886. Soho shopkeeper Verloc is paid by the Russian Embassy to spy on an anarchist cell. The Russians demand that Verloc orchestrates a bomb attack that will be blamed on the anarchists and provoke a British crackdown.
Michaelis's suspicions threaten to scupper Verloc's plans
Back in London, Heat faces the Professor's madness, and Winnie finds herself alone with Ossipon.
While Chief Inspector Heat struggles to makes sense of the plot behind the Greenwich bomb, Winnie is devastated by the news of Verloc's role in the outrage.