June, 1917. While German Gotha bombers raid London from above, a man's body is fished from the Thames below. The man had been garrotted and his tongue cut out before he was left to his watery grave, and as the killer has taken care to remove identifying items and even labels, Detective Inspector Marmion and Sergeant Keedy struggle to name the victim before they can begin properly with their investigation.
As family and business associates are...