This is a murder mystery featuring Lord Edward Corinth & Verity Browne. Verity Browne & Lord Edward Corinth are attending the memorial service in Westminster Abbey for Lord Benyon killed a few months before when the Hindenburg airship burst into flames as it docked in New Jersey. As the congregation begins to disperse after the service Edward hears Miss Pitt-Messanger cry for help. Her father is slumped in his seat stabbed to death with an ancient Assyrian dagger. Edward has no wish to investigate the murder but Verity gets herself invited to Swifts Hill the ultra-modern house in Kent belonging to the millionaire Sir Simon Castlewood. His wife Virginia is one of Veritys school friends & she is looking after Maud Pitt-Messanger who is still grieving for her father. Verity quickly discovers that the old man was a selfish bully who had made his daughters life a misery & prevented her from marrying the man she loved. By coincidence Mr Churchill then asks Edward to investigate the Castlewood Foundation which Sir Simon has set up to fund medical research among other worthy projects. Churchill has received information that Sir Simons protege the eminent surgeon Dominic Montillo is using the Foundation to fund his own research into racial types
- the so-called science of eugenics. Then Maud Pitt-Messanger is herself stabbed to death with a dagger from Sir Simons archaeological museum & Edward & Verity join forces to find her killer
- but Veritys distrust of Winston Churchill & her growing attraction to the young German aristocrat Adam von Trott drives a wedge between them which brings them both unhappiness & endangers the outcome of the investigation.