A famous writer disappears from her own home under mysterious circumstances. Her husband is the first suspect. It was he who called the rescue service, saying that he had found his wife dead in the pool. However, the arriving police squad does not find any trace of the woman.After several years of unsuccessful searches, the investigation comes to a standstill. All charges against the writer's husband, Alan Fleming, are dropped, and she herself is declared dead and the case is closed.The mystery of the disappearance would have remained unsolved, but another mysterious figure appears in Alan's life - Annabelle Audley, his cousin missing wife. Anna reports that she was in a long-term correspondence with her sister, and makes it clear that she knows much more than Alan told the investigation.