Diplomat Jess Turner is in London and working on the China desk in the Foreign and Commonwealth Office. It's her job to ensure the State visit of the Chinese Premier runs smoothly. But tensions are running high. As work progresses, Jess uncovers a shocking secret. A British diplomat, Marianne Henderson, went missing in Shanghai in 1984 and has never been seen again. Not only that, all evidence she ever existed vanished with her. When Jess starts asking questions, she is warned off. But she is caught up in a chain of events she has no power to control. As she digs into the past to find out what happened to Marianne, Jess finds herself in grave danger.