In 1935 in Peiping, Shen Qingyun, a young lady from a scholarly family, accidentally met Lu Jingran, an underground party member. In order to help Lu Jingran deliver anti-Japanese intelligence, she disguised herself as a teahouse clerk and was involved in danger several times under the strict surveillance of the Japanese army. The two supported each other in the flames of war, but were separated due to a misunderstanding, and finally reunited after the victory at Pingxingguan. Summary of story background: The background is Peiping after the North China Incident, and the Japanese army tightened control