The discovery of a blood-encrusted stiletto knife in journalist Emmeline Kirby's bag at Heathrow Airport sets in motion a chain of events that ensnares everyone she holds dear. The body of Sebastian Jardine is soon found in the boot of Superintendent Oliver Burnell's car, leading to accusations that he and Emmeline conspired to commit murder. Desperate to clear their names, she turns to Philip Acheson of the Foreign Office for help. But when two Special Branch officers arrive to arrest him, he is forced to go on the run.

Gregory Longdon, Emmeline's husband and a jewel thief/insurance investigator with ties to the criminal classes and MI5, is the only man Philip can trust. Gregory is on his own quest to prove her innocence in a game that makes no sense. Jardine was no stranger. His old friend was a former Interpol agent, who soured on the law and succumbed to his baser instincts. The real problem is Jardine died five years earlier. A fancy pink diamond with a murky provenance that men are willing to kill to possess holds the key to the truth. From London to Malta, Emmeline and Gregory are drawn into a web of corruption and revenge. Will they forfeit their lives for justice?