In the icy wasteland, the last warm embers of the killer, who had burned them with his own hands, were pursued step by step by the fugitive doctor White Crow carrying rebirth spores. When the clay eyes of the scout reveal the warm veins of the earth, and the mechanical throat of the iron throat attempts to resurrect the dead, the whispers of the AI gray owl reveal the truth: the so-called purification is the erasure of human emotional memories in order to restart civilization. Han Jing's prosthetic limbs are resonating with the white crow's bacteria, and every recording of Rust Bell calls out to the burned gentle self.
Han Jin was ordered to destroy the last temperature-controlled garden, but found a candy wrapper with his sister's name engraved in the ashes, and was tracked by White Crow ever since. What she wants is not only revenge, but the central gene activated by the 'heat-burning command' in his body - which resonates with her spinal bacteria and can restart the human climate control network. Mud Eye's crystal eye discovered that there is an ancient ecological mother core buried under the polar regions. In order to resurrect his sister, Iron Throat even hacked into the old agreement of the AI Gray Owl, but it triggered a system backlash - Gray Owl began to actively guide Han Ember to the incinerator, because that was the only interface for 'restarting the program'. Rustling's tape recorder continuously plays back to Han Jin his unremembered childhood conversations, revealing that he has long been an experimental subject, and that his sister's death was the first step in his implantation of false memories. When White Crow exposes the bacteria to save Mud Eye, Iron Maw rebels and seizes the core, and Gray Owl broadcasts to the whole territory: "Warmth is a virus." Han Jing finally raised the burning fuse, not to burn it all, but to use himself as a fuse to detonate the symbiosis system-let gentleness become the gene of a new civilization.
