In the spring breeze of Shanghai in 1926, the first encounter between Shen Qingmei and Lu Jingming was a battle of top IQs. She is a pretty and beautiful talented girl from the Department of Mathematics, who has an amazing talent for deciphering codes and protects the country's industry with her ingenuity; he is a gentle and sinister young professor who is responsible for national defense scientific research and uses his knowledge to seek a way to strengthen the country. The beacon of the Northern Expedition rose, and the cold voice of September 18th came. From the temptation of meeting opponents, to the trust of sharing the same boat through thick and thin, to the deep love of soul connection, they integrated their personal feelings into the legacy of the "Qiming Project". There is no bloody entanglement, only two-way running, with wisdom as armor and patriotism as the original intention. They are each other's strongest support in troubled times. On the eve of the Anti-Japanese War, thousands of miles apart, encrypted radio waves conveyed feelings, a sentence of "mountains and rivers", a lifetime of obsession, the most profound and pure love of the Republic of China.
