Adolf Verloc is a double agent, working for both the British police and a foreign country. He pretends to live a normal life, with his wife, Winnie, and has a shop in London, which, at night, becomes a meeting place for anarchists. One day Verloc is told to plant a bomb but the plan goes terribly wrong Does Verloc really love Winnie, or is she just part of his cover? Can Winnie ever forgive him? Who is Verloc really working for?