"The envelope was tied with three delicate silk ribbons: 'One of the new recruits is not to be trusted...' It's 1959 and a new killer haunts the streets of London, having baffled Scotland Yard. The newspapers call him The Florist because of the rose he brands on his victims. The police have turned yet again to the Inquirers at Miss Brickett's for assistance, and second-year Marion Lane is assigned the case. But she's already dealing with a mystery...