In Second World War Bath, young, naive wireless engineer Will meets German refugee Elsa Klein: she is sophisticated, witty and wordly, and at last his life seems to make sense . . . until, soon after, the newly married couple's home is bombed, and Will awakes from the wreckage to find himself alone.
No one has heard of Elsa Klein. They say he was never married.

 Seventy years later, Laura is a social worker battling her way out of depression and off medication. Her new case is a strange, isolated old man whose house hasn't changed since the war. A man who insists his wife vanished many, many years before. Everyone thinks he's suffering dementia. But Laura begins to suspect otherwise . . .