A major Crime Squad investigation, that is, following the murder of Monica Heneky, a vivacious sixteen-year-old schoolgirl who appears to have been the sixth victim of the elusive North London rapist-strangler. Her missing knickers aside, this crime's somehow different. . . and it's up to Arthur Milton--a ""plodder"" of a Detective Sergeant and her neighbor--to solve it for himself. A thoroughly competent job of pugnacious police procedure.