Flicking through her friends' holiday snaps, Kate Benson receives a shock. There in the background is her husband, Charlie. Dark hair, blue eyes, familiar smile: there's no mistaking him. But that's impossible. Because Charlie died a year ago.

Determined to track down the man in the photograph, Kate follows the trail from Miami to Sicily, where her husband drowned in mysterious circumstances. But when she discovers serious discrepancies in the original investigation, Kate starts to question whether she ever really knew the man she loved so much.