Pretty, young Anne came to London for adventure. She found it immediately - on the platform of Hyde Park Corner tube station, where a thin man, reeking of mothballs, lost his balance and was electrocuted on the rails.
The Scotland Yard verdict was accidental death. But Anne was not satisfied. After all, who was the man in a brown suit who examined the body? And why did he race off, leaving a cryptic message behind: "17-122 Kilmorden Castle"?