The latest addition of the Liz Carlyle series of intelligent espionage thrillers from the former head of MI5. Liz and her MI5 Counter Terrorism unit have been charged with watching the international under-the-counter arms trade, and must intercept illegal weapons before they get into the hands of extremist Al-Qaeda jihadis, a task which takes Liz on a manhunt that leads her to Paris, Berlin, and her own long-forgotten past.