One cool March morning in London, MP Leo Barr is told that his brother, Charlie, is dead. He has hanged himself from a chestnut tree in the grounds of a mental hospital. His family reacts in different ways. Charlie's mother, Imogen, sees no point in pretending that life is still worth living - he was always her favourite. Leo and his lawyer brother Roland fight, as they always have over Charlie. The fourth brother Ron, a Catholic priest, must break the news to Charlie's wife, presently in HMP Holloway. In the days following Charlie's death the conflict builds among members of the family and it becomes clear that his tragedy is only part of a web of mystery and deceit that connects them all.