During World War II spy Wu Laisheung is instructed by her superior Fan Yeungshan to murder spy number 13 Cheung Chiping While Wu establishes a relationship with Sakei the assistant general of the Japanese army she also gets acquainted with Cheung Cheung and Wu fall in love Wu recommends Cheung to become Sakeis driver Cheung pretends to court the Japanese spy Siukuen but Siukuen arranges to kill the spies contacting with him Cheung has seen through Kuens identity for long When Kuen is going to kill Wu Cheung kills Kuen Fan compels Wu to kill Cheung Wu follows the instruction to murder Cheung After the murder Wu disappears After the war Fan discovers Wu ends up in asylum When he visits Wu he tells her of Cheungs innocence This breaks Wus heart Cheung turns out to have seen through Wus identity for a long time and pretended to have been killed to cover up his identity and facilitate his work With the truth known and the war ended Cheung and Wu married
