The psychological thriller follows the story of Verloc, owner of a seedy shop in the heart of Victorian Soho. Unbeknownst to his loyal wife Winnie, Verloc also works for the Russian embassy, spying on a group of anarchists. The Russians are furious with the English establishment's indifference to the anarchist threat gripping the rest of Europe. So Verloc is assigned a mission: blow up the Greenwich Observatory and make it look like a terrorist attack to provoke a crackdown. Should he fail, Verloc's real identity as a spy will be exposed to his vicious comrades.
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.