In 1941, in the Shanghai Concession, the father of female student Lin Weiran was killed by the Japanese army. She joined the military command and disguised herself as a typist to lurk in the Japanese military agency. She stole information about "Japanese troops attacking the concession", but found out that the contact person was Rite. At the critical moment, Gu Yan, an underground party member, came to the rescue. Lin Weiran recognized the true nature of the military command of "only anti-Communism but not Japan" and switched to the underground party. Before the concession fell, he sent out intelligence to help the guerrillas move.
