In the late autumn of 1937, the Battle of Songhu ended, the Japanese troops approached the city, and the French Concession in Shanghai became a precarious "isolated island." On the surface, there is singing and dancing, but secretly there are many spies. A top-secret file related to the retreat route of tens of thousands of soldiers and civilians disappeared, and all forces took action after hearing the news. At the junction of prosperity and ruins, a silent hunt quietly begins.
