A TV journalist is invited to his ageing stepfamily's beautiful but decaying country house for one last Christmas. Beyond the gates, terrorist bombs and industrial unrest threaten the government of Margaret Thatcher. This political chaos mirrors the unravelling lives of those within - a retired British diplomat and his once glamorous wife, each burdened by past sins, suppressed guilt and approaching death. Their step-son's idealised picture of them is revealed as a sham. He uncovers a tantalising Russian doll of a story, secrets locked in secrets in a conspiracy of murder and revenge across Europe and North America, all rooted in history's greatest crime - the Holocaust.