1942, Nanjing. Following a series of assassination attempts on officials of the Japanese-controlled puppet government, the Japanese spy chief gathers a group of suspects in a mansion for questioning, and eventually, torturing. A tense game of "cat and mouse" ensues as the Chinese code-breaker attempts to send out a crucial message while protecting his/her own identity.
Xu Lu
Janice Man Wing-San
Zhou Yiwei
Zhang Zhijian
Tony Yang
Yu Ailei
Niu Zifan
Li Shimeng
Zhang Zhe