The young female painter Yan Ruosheng held a personal exhibition in the Shanghai Concession, displaying street style oil paintings; the officer Gu Cheng was touched by a painting "Suzhou Riverside", and the two talked about art and ideals; in the autumn of 1937, the Japanese army fully invaded China, and the war approached Shanghai. Sheng was inadvertently involved; Gu Cheng disappeared after the mission was successful, and Yan Ruosheng discovered her brother's secret out of concern and decided to stay in Shanghai; after the fall of Shanghai, she continued to paint in the French Concession and secretly assisted the underground organization; Japanese officer Fujiwara appreciated her talent and wanted to bribe her for propaganda, and Yan Ruosheng cleverly dealt with it; a missing ancient painting "Snow on the River" from the Song Dynasty became the focus, which contained the biochemicals of the enemy. Weapon base map; Yan Ruosheng reunited with Gu Cheng, who suddenly returned, and the two disguised themselves as cousins to fight against all forces; the traitor betrayed Yan Ruosheng and was arrested, Gu Cheng and his brother joined forces to rescue, but the brother died; Yan Ruosheng was mentally traumatized, and Gu Cheng took her to escape to the countryside of Zhejiang; in the countryside, Yan Ruosheng used a paintbrush to record the suffering and struggle of the people and regain her strength; the two completed their wedding, but received a warning An urgent mission to return to Shanghai; taking advantage of Fujiwara's guilt and trust in Yan Ruosheng, she sneaked into the enemy headquarters to steal new evidence; Fujiwara was arrested after being released, and news of the Japanese surrender came; Gu Cheng's eyesight was severely reduced due to old injuries, and Yan Ruosheng gave up the opportunity to go abroad to accompany him for treatment; after the war, Yan Ruosheng held a "War on Fire" exhibition and sold charity to support orphans; Gu Cheng's surgery was successful but his eyesight could not be fully restored.