After the Battle of Songhu in 1937, Shanghai fell, and only the concession was under the protection of foreigners, with neon lights flashing, singing and dancing peacefully, and Shili Foreign Market was working hard to maintain its last bit of decency. In the song and dance hall named Great World, Sun Ran, chief of the General Affairs Section of the Military Command Shanghai Station, secretly met with the Japanese here, and betrayed the information of the party's Shanghai underground transportation station to the Japanese. In Sun Ran's hands, there is also a list of patriotic businessmen who secretly supported the Anti-Japanese War, and what is related to the list is a key key. As soon as Sun Ran left the gate of the Great World, before the car started, he was killed and the key was taken away. Zhao Han, the leader of the concession gang, and Zhu Qiwen, the leader of another gang, are sworn enemies. Zhu Qiwen forcibly occupied the pier and refused to return it. The gang members of the two sides clashed at the pier.
Lin Xi, a member of the gang, is Zhao Han's adopted son. He asks Jin Ye, the elder of the concession gang, to come out of the mountain on behalf of his father, and asks Zhao Qiwen to return the dock. Although Zhao Qiwen agreed, he did not give a clear time to return the dock. A student movement broke out on the streets of Shanghai. Lin Xi saw a woman hurrying into the alley. He followed her and found that she quickly changed her appearance. Lin Xi became suspicious of this woman, stopped her and asked her if she was sent by Zhao Qiwen. Su Nan didn't know what he was talking about, taking advantage of Lin Xi being distracted by the policeman who was questioning him, Su Nan kicked him hard and ran away. Lin Xi picked up the school badge she dropped and found that she was a student of Fuxing Public School. In the library, Su Nan and Ling Hongjun, an underground member of the Communist Party of China, are meeting.
Ling Hongjun told her that a traitor named Sun Ran appeared within the military command, and Sun Ran betrayed the information of the party's Shanghai underground transportation station to the Japanese. This person also holds a list of patriotic businessmen who secretly supported the Anti-Japanese War. Once the list falls into the hands of the enemy, Shanghai's civil anti-Japanese forces will suffer heavy losses, and the key on him is the key to the list. The key related to the list was obtained by comrade Qingyu, but because the traffic station was destroyed, Qingyun could not transfer the key to his contact person as planned. The organization decided that Su Nan and Ling Hongjun would continue to complete the key transfer. Lu Linhan, an underground member of the CCP code-named Herring, saw the missing person notice in the newspaper and understood that this was important information, which required a specific cipherbook to correctly decipher it.
The pier was arrested and sealed off. Zhu Qiwen sent a few gold bars, apparently as an apology, but Lin Xi and his buddy Li Yunfei could see that he was uneasy and kind. Li Yunfei don't make trouble for him anymore. The younger sister Lin Yuan wanted to pay three oceans for books. Lu Linhan, the owner of the wonton stall, said that he was going back to the countryside to attend his son's wedding. He enthusiastically offered three oceans to Lin Xi. Not only did Lin Xi not ask for it, but he also asked Li Yunfei to give some money to Lao Lu as a gift for his son's wedding. At the same time, Takeda Hideo, president of Zhaozheng Industrial Co., Ltd., learned from his subordinates the secret information in the newspaper. The other party will meet at Mitsui Matheson at ten o'clock tomorrow, and it must be related to the key.
Zhu Qiwen's men made trouble on Zhao Han's ground, and Lin Xi and Li Yunfei fought against each other ten times, not losing the wind. Before Lao Lu could connect with Su Nan and Ling Hongjun, he was targeted. Lin Xi saw Lao Lu who was in a hurry and the people following him, and Lin Xi, who sensed something was wrong, followed. Lao Lu was shot, Lin Xi also saw Su Nan, but time was running out, she didn't stay long. After Lao Lu died, Lin Xi felt that the key on his body was very important, so he secretly took the key away. Zhu Qiwen learned that a person was killed in today's street shootout.