Celia lives and works in Florence as a tour guide and thinks the forthcoming birthday celebrations for the young wife of wealthy businessman Lucas Marsh, will bring the usual mix of museums, galleries and exclusive shopping. But, in the cold December weather a man's body is found in a disused swimming pool - a man who 15 years earlier was the chief suspect in an enquiry into the death of a six year old English girl. As Celia's working weekend progresses, she finds she is by no means alone in remembering the gruesome details of that terrible murder, and she and her companions seem unwittingly to get embroiled further and further into the mysteries surrounding a 15 year old grievance, and a very current murder.