The novel takes the battle of the hidden front in Shanghai in the 1934s as the main line. Wang puppet agents, Japanese special agents, military commanders, central commander agents, red agents, spy seas, multi-faceted spies, and a lot of fog. For the sake of faith and justice, he, they, faced family, friendship, love, comradeship, and comradeship, made difficult choices, parted and died, battled wits and courage with enemy agents in the "deep sea", survived a narrow escape, accumulated the power of "Dawn", and finally ushered in the dawn of victory.
Salute to those national warriors on the hidden front who defended their dignity by donating blood and created brilliance with their faith on the front lines behind enemy lines. They shed blood on the "isolated island" of Shanghai during the Anti-Japanese War and accumulated strength in the "deep sea" to finally usher in the dawn of dawn.
