John Rutherford, bookseller and sometime fiction writer, discovers the bludgeoned corpse of a policeman one evening while taking a stroll in a rainstorm. The policeman's overturned bicycle is what first catches Rutherford's eye. Then he sees Officer Johnson's body sprawled on the sodden ground of Phantom Coppice. Rutherford takes Johnson's bike and pedals to rural Paulsfield police station, two miles away, to report the crime.
There he finds Sgt. Martin who initiates calls to a doctor, a photographer and Inspector Charlton. But it is not these two lead detectives who are the most interesting characters of the book. That honour goes to 19 year-old George Stubbings, assistant at "Voslivres," the bookshop Rutherford owns. George is a detective story addict and he is keen on solving the various mysteries surrounding Johnson's violent death. He is both ingenuous in dealing with Rutherford and ingenious in his precocious observations about the apparent murder. Murder in Blue is the second of Galileo's Clifford Witting's re-issued classic detective thrillers.