As the chaos in Yong'an escalates, Shen Zhen finds herself navigating the harsh realities of the streets, her sheltered existence shattered. Meanwhile, Lu Shiyan's pursuit of justice becomes intertwined with his unexpected connection to Shen Zhen, leading them both into an uncertain future. Despite the odds stacked against them, their collaboration leads to significant revelations about the West Canal collapse. However, as they draw closer to the truth, they also attract the attention of a formidable adversary, whose presence threatens their newfound bond and jeopardizes their lives. As they confront the looming danger, Shen Zhen and Lu Shiyan must rely on each other's strength and determination to survive the treacherous journey ahead.
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.