A high ranking female MI6 officer - Jayne Archer - commissions private detectives Ben Sign and Tom Knutsen to investigate two matters: first, why her best Russian double agent has lost her nerve and no longer wants to work for Archer; second, what has happened to Archer's twin sister who was separated from her at birth in Moscow. Sign and Knutsen travel to Russia to get answers. When the truth is uncovered, they realise they've opened a Pandora's Box of lies, tragedy, and treason.