A mission is blown in Bucharast: London's Bureau agent is killed and his Russian contact fled before priceless information could be delivered. Quiller is called in to track down the contact and proceed with the mission, code name Meridian. From the Siberian Express to the northern city of Novosibirsk, Quiller must follow increasingly elusive links to uncover the secret that, if unexposed, will destroy world stability and countless lives.