It depicts a long picture from farewell on a rainy night in the south of the Yangtze River in 1932 to the intertwining of fate clues again during the war in 1938. Gu Yunsheng and Shen Qingyi, the lovers who were separated by the torrent of the times, experienced the struggle in Shanghai, the catastrophe in Jinling City, the hardships and life-and-death tests of fleeing thousands of miles, and finally found their destination and direction under the banner of national salvation - he sneaked behind enemy lines and weaved an intelligence network; she joined the guerrillas, contributing wisdom and courage. Their love was tempered in the furnace of hatred between the country and the family, and was sublimated from the personal relationship between children to the deep watch of revolutionary partners.