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 of her own, having received an unsigned letter warning her that one of the three new recruits should not be...

"Late one night in April 1958, a filing assistant at Miss Brickett's receives a letter of warning, detailing a name, a time, and a place. She goes to investigate but finds the room empty. At the stroke of midnight, she is murdered by a killer she can't see--her death the only sign she wasn't alone. It becomes chillingly clear that the person responsible must also work for Miss Brickett's, making everyone a suspect. Marion Lane, a first-year Inquirer-in-training,...