In 1939, two years after the Songhu Battle, Shanghai had become an isolated island. There was singing and dancing in the concession, but the Japanese army was rampant outside the concession. A top-secret Japanese chemical weapons transportation route map leaked from the Hongkou headquarters, and the underground radio station "Night Owl" must send it out of Shanghai within a week. The new section chief of the Special High School Division, Sato Ichiro, has already driven the radio detection vehicle into the French Concession.
