On the eve of the Sino-Japanese War, engineer Shen Yanqiu went to England to inspect and accept Beiyang Navy ship parts, but he was caught in a whirlpool of conspiracy. The supervision report was tampered with, tabloid smear campaigns ensued, and Japanese spies were secretly at work. When he was in danger, he was ordered to investigate the arms trade. Letters from home were cut off and his family was spied on, adding to the crisis. London is locked in fog, making it difficult to tell the truth from the false. An intelligence game concerning the fate of the family and the country has quietly begun.
