On the eve of the liberation, the Kuomintang authorities secretly trained a group of female agents to engage in espionage activities. After obtaining this intelligence, our army carried out operations to subvert these female agents. Zhou Qiaozhen, an underground female party member, passed through layers of tests from the Military Statistics Bureau (MSB) agents and stayed at the MSB school. The guerrillas, utilizing their advantageous conditions in the mountains and with intelligence provided by Zhou Qiaozhen, disrupted several MSB agent activities. Within the MSB school, everyone was in fear, suspicious of each other, and Zhou Qiaozhen was almost uncovered by them. The actions of the MSB agents left several female students disheartened. Through continuous efforts, Zhou Qiaozhen succeeded in winning the trust of several female agent students, successfully changing their fates, leading them to abandon their dark pasts, embrace the light, and walk towards a better tomorrow.