
During the Second Sino-Japanese War, Captain Kong Yuan of the New Fourth Army is captured while defending a munitions factory. His brother, Kong Fang, a math professor with knowledge of Japan, and his fiancée, a psychology professor, infiltrate the Japanese-occupied area with the help of the New Fourth Army.
Xin Fang

Kong Fang

Xiang Haiyin

Heng Weikuo

Tan Zhen

Yang Quanru

Lu Da

Gong Dahe
Cai Jun

Kong Liangfeng
