The unthinkable has happened at London's Peculiar Crimes Unit. In the depths of winter, a member of staff has been found murdered, and everyone who works there is suddenly a suspect. But Arthur Bryant and John May, the eccentric elderly detectives who run London's strangest crime division, aren't on hand to solve the crime. They've ventured into the heart of the English countryside, only to become stranded on a desolate snowbound section of road....

"A teenager sees a dead man rise from his grave--and moments later is killed in a sudden hit-and-run accident. Seven ravens housed in the impenetrable fortress that is the Tower of London vanish without a trace--and legend has it that when the ravens leave, the city will fall. Bryant and May must figure out how these two inexplicable, seemingly unrelated mysteries fit together as they begin an investigation that finds them confronting a group of latter-day...