Ning Wei, a 29-year-old financial elite, accidentally traveled to Shanghai in 1935 when he was at the lowest point in his life, and was involved in the overt and covert battles between the Youth Gang, the underground party and Japanese military agents. Relying on modern financial knowledge and historical foresight, she dealt with the youth gang leader Du Qingfeng and the underground party intelligence agent Cheng Yichen, changing history and being changed by history. When love and mission intertwine, and the past and the future collide, she must make a choice between returning to modern times and saving the people she loves - because their sacrifices have already been written in the history books, and she may be the only one who can change the outcome.