Zhang Qishan led people to continue searching for Wu Laogou. Iron cages and animal traps fell in the passage, trapping some people.Modern electric lights appeared on the wall. Zhang Qishan judged that this was a fortification left by the Japanese, indicating that there was something in the Separate Building that they were afraid of and wanted to master.

Huo Wenhai found Jie Jiu and put pressure on Jie Jiu because he had studied in Japan and had contacts with Kinoshita, forcing him to sign a confession and hand over his interests.Jie Jiu didn't want the Jie family's name to be tarnished.Underground, Zhang Qishan discovered the daily necessities of the Japanese army and the bodies of Japanese soldiers who committed seppuku. The evidence that there had been long-term Japanese activities in the secret passage became increasingly clear.

Zhang Xiaodi read out the letter left by the Japanese army, which mentioned that there were more valuable underground targets besides the Changsha meteorite.Zhang Qishan realized that these people may not have been prepared to leave alive from the beginning, and Hatoyama Yoshi may also continue to act in other areas of the Geshi Building.

Wu Laogou finally reunited with Roller Blind and Huo Xiangu, and realized that the injury he saw before to his companions was an illusion caused by the heart fire magic.He expressed his feelings to Huo Xiangu in a moment of excitement, and saw the images of his past life in front of Huo Xiangu. The secret passage continued to bring everyone's obsessions before his eyes.

Tianpeng and Zhenyuan's cry for help came again. Wu Laogou pressed the formula and rolled up the curtain to open the yin and yang buttons at the same time, and finally rescued the two.On the other side, Zhang Xiaodi learned from the diary that the Japanese team was followed by unknown objects and was ordered to commit seppuku after running out of supplies. The danger in the isolation building obviously came not only from the agency.

Zhang Qishan discovered that the deep well may lead to the direction where the Japanese army leaders left, and the telegraph machine also continued to send signals for help.After Wu Laogou experienced a dangerous journey, he decided to take his tribe away first. Huo Xiangu respected his choice, while Zhang Qishan must continue to track down the target the Japanese were looking for underground.