The Great Wall is thousands of miles long, and outside the Great Wall is my hometown. In 1941, Shanghai was turbulent, and a firm belief under the strangeness led to a romantic Shanghai love story. The story takes place in the action area, where many people with different identities are lurking again, but they are firm in their beliefs. Tang Shanhai and Xu Bicheng airborne here on a rainy night, carrying the mission of military command, and began their deep dive.