Li Tsui-Ying (Pai Hung), the Best Secret Agent, disguises herself as a train conductor to assist Changjiang guerrilla leader Chiang Hsiao-Tien (Wu Chia-Chi) to evade the patrol of Japanese troops. Li adopts the pseudonym of White Peony in her Peking opera performance for the puppet government president, Han Zhaogui. Chiang discovers that his former lover Liu Feng has become Han's wife, but he finds that Liu still loves him and keeps their love token golden pheasant heart. White Peony would like to destroy the Japanese army’s project of building a secret airport. However, when she rescues Chiang from Han’s secretary, Ma Zuo-wen during an attack of Han in the cinema, White Peony falls in love with Chiang, without knowing that Chiang’s lover is Liu. In a final duel between White Peony vs Ma and Han, she realises how much Chiang loves Liu. She returns the golden pheasant heart that Ma took away from Liu to the lovers. The next day when Liu wakes up, White Peony has gone.

The fourth film of the 5-film series The Best Secret Agent series of taiyupian (Taiwanese-language cinema), which was also dubbed into a Mandarin version.

In quiet campuses everywhere, incidents of kidnapping of school children occurred one after another. When the school was ordered to talk to parents about [binding], the society became uneasy and public opinion was in an uproar. Fang Hua, a popular stage star, raised her daughter Liyun independently due to a failed marriage. Liyun is very well-behaved, but because mother and daughter spend less time together and more separation, they are a family with flawed family relationships. Taxi driver Xiao Liao once bravely stopped a kidnapping case, but suffered heavy losses, which made him feel that it was difficult to be a good person in this society. Moreover, due to his own limited education, it is difficult to survive in this diverse society. The only comfort was his lover Xiulan.

The Joint Chiefs of Staff want to send some ARVNSF troops to North's Điện Biên Phủ for the Dien Bien Phu Operation. But all have been caught or killed by the Chinese spy Kiều Loan, except Major Ngọc Minh.

In the 1970s, Taiwan's first grand cabaret, The Sapphire, opened in Kaohsiung, igniting a golden decade of live entertainment. Beneath its dazzling lights, the nation's tensions and censorship faded in nights of glitz and song.Stars like Teresa Teng, Fei Yu-ching and Fong Fei-fei graced. its stage, where glamour met gambling, drugs, and danger.Half a century later, The Sapphire is resurrected—through AI and music—to relive its untamed brilliance.