The head of the Bow Street police station, Drummond, came to see his old friend, Lord Byham. He took his best inspector, Thomas Pitt, with him - because the case they had to deal with was not an easy one. Lately, Byam has been blackmailed by a moneylender, threatening to reveal a terrible secret connected with a lord and a certain lady who suddenly committed suicide. But someone killed the moneylender, and now Byam has become one of the most likely suspects. Lord asked Drummond to defend his good name and find the killer. In search of evidence, Pitt came across a strange closed organization, of which Byam and many other people from high society were members. And his wife Charlotte and her sister Emily are better versed in the subtleties of high society than Thomas...