Louise's mother is missing in the aftermath of the Boxing Day tsunami in Thailand. The only trace Louise can find is her mother's distinctive bag. Inside it is a beautiful atlas belonging to a writer named Claire. But what is the connection between Claire and Louise's missing mum, and can the atlas help Louise find her? Louise explores the mementoes slipped between the pages of the atlas and uncovers a life-changing revelation, a passionate love affair and a tragedy.And she learns a secret that nearly destroyed Claire and the man she loved - the same secret her mother has been guarding all these years ...