The wife of Yuan Tianjie, a stage actress studying in Japan, mysteriously disappeared in Japan. Yuan Tianjie returned to China to find his wife, but was trained as a spy by the military government. Together with party member Shu Xiu, who was lurking in the military government, he accepted the task of looking for the Japanese spy "Butterfly with a Thousand Faces". The identity of the big star Yao Qianqian is confusing, and it seems to have some connection with the mysterious "Butterfly with a Thousand Faces". Through investigation and analysis, Shu Xiu and Yuan Tianjie learned that Yao Qianqian was a Japanese military officer, who was lurking after the plastic surgery of her personal doctor Weng Zian. She assassinated many outstanding patriots in Shanghai. Shu Xiu led Yuan Tianjie and others to wage a life-and-death struggle with them under the leadership of the Central Party Organization. Finally, she was transformed into Yao Qianqian's "ever-changing beauty mother". She is actually the Japanese wife Yuan Tianjie is looking for. Finally, justice triumphed over evil.