Searching through a little-used cupboard at home, TV history man Glyn Peters chances upon a photograph he has never seen Taken in high summer, many years before, it shows his wife, Kath, holding hands with another man As Glyn begins to search for answers, he and those around him find the certainties of the past and present slipping away, and the picture of the beautiful woman they all thought they knew so well, distorts, changes, grows mistier