Lin Wantang, a female college student in the 21st century history department, touched an old school uniform while sorting out the archives of the Republic of China in the school history museum, and her soul traveled to Nanjing in September 1937, becoming a female middle school student "Jing Qiu". She predicted that Nanjing would fall and a massacre would occur three months later. She decided to use the historical knowledge, toxicology, and first aid knowledge she had learned in modern times to save people and fight in extreme environments. She joined forces with latent underground worker Zhou Jingxing and dock worker Lao Shen to launch a life-and-death rescue race against time before and after the city fell.
