Time travels back to the last century during the Anti-Japanese War of the Republic of China. One is Sheng Jinhan, an orphan from a poor family in Tianjin City, and the other is Song Shiyu, a daughter of a famous family in Shanghai. They have exactly the same two beautiful faces, but they shoulder different revolutionary missions. For the sake of faith and the country , dealing with various forces in Tianjin and Shanghai, including the Japanese army, the Kuomintang and the Communist Party, and gangs; across the flames of war, across faith, from Shanghai to Tianjin, entangled in the completely different love of two men, they composed a song of spy love that belongs exclusively to women amidst the flames of war.
The twin sisters in the war of the Republic of China. Is she the orphan Sheng Jinhan? Or the daughter of Song Dynasty? She is both Sheng Jinhan and Song Shiyu.