Jordana and Beril Tavistock’s father and mother, agents of the British secret service, were murdered in Paris under mysterious circumstances. The orphaned children were raised by their uncle Hugh, who in the past was also a spy. At a party at the uncle’s house, the drunken guests don’t even notice when brother and sister learn that twenty years ago the police and intelligence services concluded that the traitor Bernard Tavistock killed his wife and then committed suicide. Beril and Jordan are convinced the case was fabricated—but how can they prove it? The siblings go to Paris to get to the truth and protect their parents’ good name…