Mr Verloc, the secret agent, keeps a shop in Londons Soho where he lives with his wife Winnie, her infirm mother, and her idiot brother, Stevie. Verloc is part of a group of anarchists who believe in overthrowing the government and who also function as somewhat ineffective terrorists.
The agent is secretly employed by a foreign embassy, probably Russia, to blow up the Greenwich Observatory. The Secret Agent is a a story set earlier (1886) telling an allegory of terrorists and anarchists based in Edwardian England.
The complicated plot is masterful, the prose sophisticated, and the characterizations full and engrossing.