Butterfly, a large and medium-sized spy war suspense drama, tells a short story about a Japanese woman who is deeply ambushed and persecutes the underground party in order to better serve her country. Yuan Tianjie, a music artist who went to Japan to study abroad, mysteriously lost his wife in Japan.

Yuan Tianjie returned to China to find his wife, but was trained as a spy by the Military Bureau. He accepted the task of finding Japanese agents with Shu Xiu, a producer of * * * lurking inside the Military Bureau? The real identity of Yao Qianqian, the superstar of A Beautiful Mother in a Variety, is very complicated, and he seems to have some connection with the mysterious A Beautiful Mother in a Variety.

According to reconnaissance and analysis, Shu Xiu and Yuan Tianjie learned that Yao Qian was a Japanese soldier, and she was ambushed by family doctor Weng Zian after plastic surgery. She assassinated many outstanding patriots in Shanghai.

Shu led Yuan Tianjie and others in a life-and-death struggle under the leadership of the grassroots party organization of China * * * Production Party, and finally became the "ever-changing beautiful mother", which was actually the Japanese wife Yuan Tianjie worked so hard to find.

Finally, justice triumphs over evil.