Advertising agent Victor Dean falls to his death from an iron staircase at the Pyms advertising agency, but it seems that no one regrets it. Until a curious and questioning new copywriter begins to confuse employees with inappropriate questions. To investigate Victor's death, Lord Peter Wimsey, under the name of his cousin Des Bradon, gets a job at this agency, but soon falls into a tangled web of extortionists and drug dealers, at whose hands five people have already died. Will Wimsey be able to stop the series of endless murders and thwart the sinister plans of the scammers?