Scotland Yard superintendent, Richard Jury investigates the murder of wealthy bachelor Billy Maples in a shady London motel. He discovers connections between the murder and the distant past through Maples' grandfather, who served as one of Britain's top code breakers during WWII.

"In the latest series outing, The Knowledge, the Scotland Yard detective nearly meets his match in a Baker Street Irregulars-like gang of kids and a homicide case that reaches into east Africa. Robbie Parsons is one of London's finest, a black cab driver who knows every street, every theater, every landmark in the city by heart. In his backseat is a man with a gun in his hand--a man who brazenly committed a crime in front of the Artemis Club, a rarefied...

The body of a blond shopgirl lies on the cold cobbles not far from a fashionable Mayfair pub called I am the only running footman. She has been strangled with her own scarf-and that pecuarity reminds Scotland Yard's Richard Jury of an unsolved murder in Devon, where the irascible local constable Brian Macalvie presides. Macalvie is convinced the two deaths are connected. Jury has nothing to tie them rogether but the fatal scarves..until he visits...