From 1931 to 1945, the situation in Shanghai was turbulent, with many factions and vigorous revolutionary movements. Qin Sizhi, the daughter of the Shanghai aristocratic Qin family, returned from studying in Japan, but unexpectedly discovered that her parents had disappeared, leaving only the Qin family's huge family business. Sizhi relied on her knowledge and the help of housekeeper Zhong Puchen to revitalize the family business. During the process, he met Bo Mu'an, an underground member of the Chinese Communist Party, and joined the Communist Party of China under his guidance. By chance, he meets Zhonglu, his childhood playmate and the son of the housekeeper. His true identity is a member of the Fuxing Society and his pseudonym is Zheng Tiange. Due to special reasons, the two could not recognize each other, and then began an unforgettable love. After experiencing ups and downs in career and emotions, Si Zhi was determined to be self-reliant and changed her name to Zuo Nian. As an entrepreneur, she dealt with various forces. The Anti-Japanese War broke out, the enemy threatened and lured her, and her competitors repeatedly framed her. Si Zhi took the lead and worked hard at every step, but she discovered the shocking secret hidden in her parents. She made a painful choice between national justice and love and hatred.