Sun Yang
Xu Ruomei
Li Huiru
Ma Ching
Gao Jie
Kawamura
Hung Shih-chi
Big Brother Chen
Zhang Biao
Nie Yuting
During the Japanese invasion of China, medical students Sun Yang (Chang Yang) and Xu Ruomei (Bai Luming) pretend to be a doctor and his wife to engage in intelligence work behind enemy lines.
