In the late 1920s, Cai Zekang, from a prominent Ningde family, moved to Shanghai to study at Tongji University while secretly seeking Communist Party connections. After confirming his membership, he adopted the alias Cai Wei and was tasked with establishing a radio station in the Eyuwan Soviet area. There, he set up communications for the Red Fourth Front Army and trained new operators, using his mathematical skills to provide vital intelligence that supported the Red Army's efforts during a critical period.
Lin Xiao Pan's parents divorced when she was a child, and after that, she went to Japan with her father to study, and graduated from Japan Junior College majoring in home economics. She seems to be silly and sweet, but in reality it's opposite - she's a stubborn and enthusiastic girl with a sense of justice. Her father dotes on his daughter and runs a Chinese restaurant in Japan. Xiao Pan wanted to marry her boyfriend Zhou Zhi Wei, regardless of his father's opposition and his poor social background. But she didn't expect that he will run off, hearing about it. Wanting to start anew, Xiao Pan comes to Shanghai, and accidentally took over the job of cleaning the building, which starts her career as a housekeeper. Soon, she meets Zuo Fei, grieving the lost of his wife, and they both start to become closer
He Dun, Qian Kai Yi and friends must resolve all the mysteries and misunderstandings surrounding their lives to grow and become better versions of themselves.
After the outbreak of the May 4th Movement, Li Dazhao, Chen Duxiu and others discussed China's crisis and the way out, and put forward the idea of saving China with Marxism. The National Congress of the Communist Party of China was held on a cruise ship in Nanhu Lake. Thirteen representatives including Mao Zedong came together with the common goal of reforming China.