When Eunice Bailey takes her wedding ring to a London jeweller to have it enlarged, she is very keen for it to be done quickly. She is a reliable and favoured customer and when the jeweller is unable to get in touch with her to collect the ring, he contacts the police.
Detective Chief Inspector Brock and Detective Sergeant Poole are assigned to the case, and what begins as a fairly simple missing person enquiry develops into a mystery that has ramifications stretching as far as Bermuda . . .