This is an era where gunfire is everywhere. Here is a group of warriors who go all out for their faith. They are on a battlefield without gunpowder and walk on the tip of a knife all day long. On the hidden front, they walked alone, not daring to express their love and unable to let go of their hatred. Apart from his faith, he had no thought about the future. He is not a completely selfless warrior, but he does everything he can to protect his compatriots, including his loved ones. The love between brothers is deep, Yang Muci died for his brother and sacrificed his life for the country; Yang Muci's first brother lurked in hiding, burying his love. However, on the battlefield, it is easier to die than to live. Does Yang Muci, who values love and justice, really want to leave endless pain to his elder brother? How could the resourceful Yang Muchu allow his younger brother to die? If the smart and beautiful Ronghua was still alive, if it was not Aci but Achu who went to the teahouse that early winter afternoon, how would the story develop? This article strives to restore the history of Shanghai's spy war during the Anti-Japanese War within the scope of the original characters' personalities. Ah Chu and Ah Ci will help you uncover that thrilling legendary story. You will see true humanity, pure love, great faith, and strong warriors. Can Yang Muci successfully lurk, successfully deal with the Japanese puppets, military commanders and Wang puppets, and provide accurate intelligence to the Communist Party? Can Yang Muchu once again destroy the Japanese germ warfare and save his family's lives under the threat of the Japanese and puppets? Can Yang Muchi finally hold hands with Ronghua and fulfill his "lifelong" promise? Can Yang Muchu enjoy the bitterness and prosperity with He Yashu forever? Can Du Lvning cooperate with the two brothers to play this game well? Are the two masters and disciples enemies facing each other with swords and guns, or are they truly affectionate father and son? The fog is thick, who is strategizing behind the scenes? With the smoke filling the air, who can have the upper hand? Although we have never experienced it, we are willing to pay tribute. No one is born great, it is their actions that make them great.