Welcome to a London House. A man walks out of East Berlin with a story to tell, of strange houses where you can contact the dead, houses that the secret services of the Eastern Bloc have infiltrated. They are using them for their own purposes, the passing of espionage secrets from West to East in a way more secure than any code. Tradecraft is needed if the grey men in the UK are to penetrate this new network. But Sigil Houses have their own secrets, ones that are protected even beyond death. Welcome to a London House. It is 1967. The Russians are coming.