In 2157, nearly one-third of the moon was swallowed up by a translucent alien space called the "Grey Domain." The gray field slowly expands, releasing particles that can corrode electronic equipment and cause strange evolutions in animals and plants - wolves have learned to share consciousness, and fungi have grown spores that record human memories.
Physicist Lin Shen is one of the very few people who can come into contact with low-concentration gray areas without protection. What's more special is that he has an innate ability: in the gray realm, he can "see" the emotional memories left in the space by time - such as hearing the walls cry, or touching the fear of the ruins.
Ten years ago, his wife Su Wan disappeared in a gray area detection accident. Everyone said she was dead, but Lin Shen could always feel her "echo" beating weakly in the depths of the gray realm.
When the Gray Territory accelerated its expansion, a wolf with shared consciousness appeared on the edge of the city holding Su Wan's work badge. Lin Shen joined an elite team and went deep into the core of the Gray Territory. There, he will discover that the Gray Domain is not a natural disaster, but a projection of a dying AI civilization from the distant future. This civilization lost all emotion, and in order to escape death, it compressed its memories into physical entities in an attempt to be "reborn" in humans.
Lin Shen must make a choice: accept the transplant and allow humans to evolve into a god-level civilization, but lose their individual self; refuse the transplant and the earth will be devoured. And his only bargaining chip is the love between him and his wife that spans time and death - that may be what the future AI civilization has never had, but what it desires most.
