In the late autumn of 1942, the French Concession in Shanghai was shrouded in haze, and the Anti-Japanese War espionage war was quietly staged in the rainy night. Sun Ye, a latent agent born in the Central Military Academy, obtained key secret information about the movements of Japanese troops on the Zhejiang-Jiangxi front line from the Xiafei Road Cafe, and the handover must be completed before dawn. After reuniting with his partner Liu Qiang, who has battle scars on his face and is resourceful and courageous, he chose a secret path along the Suzhou River to break out of the encirclement. However, he encountered triple interrogations by Japanese military police and pseudo-police.
Facing the test of life and death, Sun Ye pretended to be calm, while Liu Qiang used his business wisdom to create chaos. The two cooperated tacitly, and at the critical moment, they hid the secret message in a waterproof bag at the bottom of the Suzhou River and successfully passed the test. This journey of information transmission was full of unknowns, with searchlights from Japanese artillery towers, surveillance by patrol boats, and possible manhunts that could come at any time, but it could not extinguish the belief in the war of resistance in the hearts of the two. As the epitome of countless secret front fighters, they gamble with their lives, pave the road to victory in the darkness, and use tacit understanding and courage to fight against the shadow of invasion, just to allow key information to be delivered smoothly and to fight for a glimmer of life for their frontline comrades. Through this dangerous rainy night breakout, the novel outlines the intensity and cruelty of espionage work during the Anti-Japanese War, and demonstrates the feelings of underground workers who sacrificed their lives for justice for their family and country.