The encounter between Cha Xianxiu and Zheng Yiming on the first floor reveals the new crisis facing mankind.People who were originally united began to divide and form different positions because of Zheng Yiming's remarks.Cha Xianxiu showed his courage and wisdom in the crisis and tried to calm the conflict, but the result was not as he wished.

The appearance of Kim Young-soo brings a new twist to the story.His original intention of looking for Han Douzhi was just to repair his toys, but he inadvertently revealed the subtle relationship between humans and monsters.The death of the green ooze monster made Cha Xianxiu begin to agree with Zheng Yiming's view that humans and monsters cannot coexist.This change in concept indicates that mankind will face greater challenges.

The appearance of Lee Eun Yoo brought new revelations to Cha Hyun Soo.She reminded Cha Hyun-soo that even in difficult situations, you should choose your friends carefully.And Lee Eun Hyuk's betrayal made Cha Hyun Soo deeply angry and disappointed.The conversation between Xu Yijing and Zheng Yiming reveals the coldness and ruthlessness of the army. They only care about their own interests and do not care about the life and death of mankind.

The mutation of Uncle Han Douzhi is another climax in the story.Before he mutated, he expressed his love and protection for his children. This kind of fatherly love is touching.However, his mutation has brought new threats to mankind.Anjixie's discovery at the graveside heralded the existence of the underground world and provided new hope for human survival.

The survivor's report and Zheng Yiming's obstruction constitute another conflict point in the story.For his own benefit, Zheng Yiming did not hesitate to shoot Park Yuli and other survivors.His behavior completely angered Cha Xianxiu, leading to a fierce conflict between the two.In this conflict, Cha Xianxiu successfully defeated Zheng Yiming with the help of the monster's power.However, he also lost his mind because of this. Fortunately, Han Douzhi's appearance restored his mind.

At the end of the story, the arrival of the army and Cha Hyun-soo's amnesia left the story in suspense.