Richard Jury considers the authenticity of a fantastical tale, told by a stranger and fellow patron at the Old Wine Shades pub in London, about a string theory scientist's wife, son, and dog, who disappeared without a trace nine months earlier.

"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...

While flat on his back in a hospital bed, sleuth Richard Jury overhears a story that provokes his next murder investigation.

"When the body of a French woman washes up on a wild inlet off the Cornish coast, Brian Macalvie, divisional commander with the Devon-Cornwall police is called in. Who could have killed this beautiful tourist, the only visible footprints nearby belonging to the two little girls who found her? While Macalvie reexamines the scene in the Scilly Islands, inspector Richard Jury-twenty miles away on Land's End-is at The Old Success pub, sharing a drink...