The frustrated Adi decided to seek death. He sat alone in an isolation room full of purple flowers and took a deep breath. He soon passed out. At the same time, the animal army and the last human were fighting fiercely outside. When the overall situation was decided,, when humans finally evacuated and began to move towards Yellowstone Park, Adi woke up leisurely and was very surprised that he was not dead.

After learning that the last humans were coming, Gus and others decided to let Betsy take the half-human children to the Andersons' house to stay temporarily. Only Gus, Jep and Amy were left in the wooden house. After the last humans arrived, JohnnyAfter Yellowstone Park, he used the pistol Abbott gave him to try to stop Abbott. Unexpectedly, the pistol had no bullets at all. Abbott said Johnny could leave, but shot Johnny in the back and killed Johnny himself.

The last humans who entered Yellowstone Park fell into the traps set by Gus and the trio one by one, and were almost wiped out. Wendy ran back to the cabin alone because she was worried about Amy's safety. On the way, she was caught by Abbott's right-hand man.Fortunately, Betsy arrived in time to rescue her. During the fight, Wendy saw the belongings Betsy had dropped, which contained photos of her and herself as children, and she discovered that Betsy was her biological sister.

Abbott broke into the cabin and got into a fight with Amy. Amy said that she had been infected with the epidemic and injected the virus into Abbott's body. Gus rushed out with the antidote. AbbottThey pursued him with a shotgun. Just when Abbot successfully suppressed Gus and was about to kill him with one shot, Gus roared, and then the bulls ran towards them, knocking Abbot away and trampling over him., but the Bulls all bypassed Gus.

Before he died, Abbott shot Gus with an arrow, which caused Gus, who was recovering in bed, to dream that his mother Miller was asking for help. Jep also listened to the tape, and Betsy even discovered the child that her father left behind.The book contains information about Alaska.Gus, Betsy, Wendy and Jep decided to set off again, and their destination was Miller's location - the Alaskan outpost.