Within a day of abandoning her chicken farm and moving to London to seek her sister, Audrey Bedford is caught passing the Queen of Finland's stolen necklace, and allows herself to be sent to prison for a year rather than implicate her guilty sibling. Once released, she takes a position as scribe to the mysterious Mr. Malpas, who lurks in his electrically-automated apartment and only allows himself to be seen from across a darkened room. When Malpas' neighbor, the Australian Mr. Marshalt is murdered in the lair, Audrey is enmeshed in a tangle of lost diamonds, a long-burning feud, the fate of her father, and the affections of Captain Dick Shannon, Chief Inspector of Scotland Yard. ( )