The Secret Agent follows the exploits of Mr. Veloc, a secret agent who spies on revolutionary groups for an unspecified Embassy. The Embassy, hoping to incite public outrage about anarchists, orders Veloc to blow up an Observatory. Veloc carries out his orders, but his mentally impaired brother-in-law Stevie is killed in the blast. When Veolc's wife Winnie discover's her husband's role in her brother's death, she kills him. This novel of intrigue explores themes of terrorism, anarchism, and exploitation.