This work is set in Shanghai, in 1920. While on board the Expedient, Doug and Becca MacKenzie stumble across an amazing secret. What unfolds is a story of two young people caught up in an astonishing adventure and a story of an ancient order created to protect the world from evil. Using a remarkable archive of documents, the extraordinary events that took place so many years ago have been painstakingly reconstructed for the very first time.