1938, Shanghai Gudao. Su Xiu, the top pianist of Paramount, is a social butterfly who travels among the rich and powerful, and is also an underground intelligence agent code-named "Haitang". Her music can captivate the whole city, and she can also hide encrypted information between the notes and transmit it to the front line of life and death.
And her husband, Fu Jingnian, the director of Secret Service No. 76, Was the person in charge designated by the Japanese side to identify and arrest "Haitang".
When the keys of the piano become the barrel of the gun, and when the person next to the pillow becomes the most dangerous hunter, this fake couple drama that began with a political marriage goes to the edge of the cliff in the smoke of gunpowder. Fu Jingnian repeatedly analyzed every melody of his wife on the gramophone, setting a verbal trap during the tender dinner; Su Xiu played a double movement under the hawk-like gaze of her husband, building a line of defense with tears and jealousy.
The rose invitation is the cage, and the improvised notes are the blade. Testing and counter-testing were performed simultaneously in the bedroom and study, until the guns were pointed at each other at the headquarters dinner. When faith and love had to make a choice, he blocked the bullets fired at her with his body, and his low-pitched confession tore through all pretense: "I can't personally send you to the execution ground." He faked his death and escaped in the dark night. They sailed on a cargo ship to the unknown Hong Kong, leaving the obituary notice of "Begonia Withered" in Shanghai.
And on the sea level when the morning light first appeared, two souls who transcended different positions finally embraced each other - Ye Haitang withered in the darkness, but love and faith were reborn on the other shore.