This novel is set in 1941 when the city is suffering under the bombardment of the German blitzkrieg. In the darkness of the blackout, Johnny is drawn into investigating the deaths of several prostitutes strangled by a desperate killer. At the same time, he infiltrates the Britannia Club, a dangerous underground fascist organisation bent on a Nazi invasion of Britain. As his investigations reach a thrilling climax, he is faced with the greatest challenge of his life. This complex and engrossing mystery is told with wit and humour, while evoking the atmosphere of London during the Second World War.