Gu Yuan rescued Lu Shijun and learned that the Japanese used Lu Shijun's identity to hide the real "black dragon". Because the Japanese did not hold Lu Shijun hostage, the plan fell through, and they could only agree to Lu Shijun's trading conditions: use themselves to exchange for Che Suwei's life. Lu Shijun was shocked when he saw the real black dragon. At the same time, he replaced Che Suwei with his own life, and then prepared to commit suicide. In the end, he fell into the trap of the Japanese. He wanted to use Lu Shijun's identity to assist in the terrorist attack. The war was imminent, and the patrol room decided to stop the Japanese's actions. Kang Yichen was in charge of blocking the Japanese soldiers disguised as athletes, while Cha Suwei disguised as a nurse and used a plan to command Lu Shijun to leave. Gu Yuan went alone, fought with the Japanese, and slashed the black dragon with his own hands. The French Concession has returned to its former peace and quiet.